2019 GMC SIERRA 1500

TIRES

General Motors LLC (GM) is recalling certain 2020 Buick Enclave, Cadillac XT4, XT5, Escalade, Escalade ESV, Chevrolet Suburban, Tahoe, Traverse, GMC Yukon, Yukon XL, 2018-2021 Chevrolet Express, GMC Savana, 2019-2020 Chevrolet Blazer, Silverado 1500, GMC Acadia, Sierra 1500, and certain Continental tires sold to the aftermarket for various model year 2018-2021 vehicles. The affected tires were cured for too long during production.

Risk: Over cured tires may develop a break in the sidewall resulting in sudden air loss or a belt edge separation which could lead to a tread/belt loss. Either condition can cause a loss of vehicle control, increasing the risk of a crash.

TIRES

General Motors, LLC (GM) is recalling certain 2019 Chevrolet Silverado 1500 and GMC Sierra 1500 vehicles. The affected tires were cured for too long during production.

Risk: Over cured tires may develop a break in the sidewall resulting in sudden air loss or a belt edge separation which could lead to a tread/belt loss. Either condition can cause a loss of vehicle control, increasing the risk of a crash.

TIRES:TEMPORARY/EMERGENCY SPARE TIRE

General Motors (GM) is recalling certain 2019-2021 GMC Sierra 1500 and Silverado 1500 vehicles equipped with certain accessory road tires and a 17" spare tire. The 17" spare tire provided with the vehicle is not compatible for use with the accessory wheels, which can cause the anti-lock brake system (ABS) to not function properly under certain conditions.

Risk: An ABS system that does not function properly can increase the risk of a crash.

POWER TRAIN:DRIVELINE:DRIVESHAFT

General Motors LLC (GM) is recalling certain 2019-2020 Chevrolet Silverado 1500 and GMC Sierra 1500 and 2020 Chevrolet Silverado 2500 trucks. One of the driveshaft joints may not have been properly welded, causing the driveshaft to separate while the vehicle is moving.

Risk: If the driveshaft separates, there may be a loss of propulsion, increasing the risk of crash.

SERVICE BRAKES, HYDRAULIC:POWER ASSIST

General Motors LLC (GM) is recalling certain 2019 Chevrolet Silverado 1500 and GMC Sierra 1500 vehicles. These vehicles received updated software for the Electronic Brake Control Module (EBCM). This software has an error, and as a result, the vehicle's electronic brake assist may be disabled. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 126, "Electronic Stability Control" and 135, "Light Vehicle Brake Systems."

Risk: A loss of electronic brake assist can increase the risk of a crash.

SEAT BELTS

General Motors, LLC (GM) is recalling certain 2019-2021 Chevrolet Silverado 1500 and GMC Sierra 1500, 2021 Chevrolet Suburban and Tahoe and GMC Yukon XL and 2020-2021 Chevrolet Silverado 2500 and 3500 and GMC Sierra 2500 and 3500 vehicles. The seat belt brackets may not be secured to the seat frame in the front-row center seating position.

Risk: If a seat-belt bracket is not secured, the seat belt may not properly restrain an occupant in the front-row center seat position, increasing the risk of injury in a crash.

SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP:ABS WARNING LIGHT

General Motors LLC (GM) is recalling certain 2019 Chevrolet Silverado 1500, Cadillac CT6, and GMC Sierra 1500 vehicles. Due to an Electronic Brake Control Module (EBCM) software error, the vehicle's Electronic Stability Control (ESC) and Antilock Brake System (ABS) may become disabled. Furthermore, if this specific error occurs, the vehicle's diagnostics will not illuminate the instrument cluster ESC and ABS malfunction warning lights. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 126, "Electronic Stability Control" and 135, "Light Vehicle Brake Systems."

Risk: If the driver operates the vehicle unaware that ESC and ABS are not functioning, there is an increased risk of a crash.

ELECTRICAL SYSTEM:12V/24V/48V BATTERY:CABLES

General Motors LLC (GM) is recalling certain 2019-2020 Chevrolet Silverado 1500 and GMC Sierra 1500 trucks. The battery positive (B+) cable rings may have been manufactured with excessive glue, potentially causing an intermittent electrical connection between the B+ cable and alternator.

Risk: An intermittent electrical connection between the B+ battery cable and the alternator could cause the vehicle to stall, increasing the risk of a crash. The intermittent connection could also lead to electrical arcing, which could generate sufficient heat to damage surrounding material, increasing the risk of a fire.

SEAT BELTS:PRETENSIONER

General Motors LLC (GM) is recalling certain 2019-2020 Chevrolet Silverado 1500 and GMC Sierra 1500, and 2020 Silverado 2500, Silverado 3500, Sierra 2500, and Sierra 3500 vehicles equipped with carpet floor covering. When the front seat belt pretensioners deploy, hot gas may vent through an opening in the pretensioner bracket, possibly igniting the carpet.

Risk: A vehicle fire could result if materials ignite inside the vehicle.

ELECTRICAL SYSTEM

Vehicle (2019 GMC Sierra SLT X31!Crew Cab 6.2 l gas engine) stopped running while driving down the road (Wednesday [XXX]. Tried to start truck - would crank over quickly but failed to start ( crank no start with no check engine light.) tried several times same result. Started after about 5-10 minutes and was displaying low fuel indicator even though we knew it had approximately 1/2 tank. We immediately put gas in it and it took approximately 1/2 tank to fill. Still no check engine light and confirmed no stored codes via onstar report. Drove the truck around for may 1hr and check engine light came on but was still running and did not stop running like it did earlier. On star reported ECM SYSTEM CODE P129F ( Fuel pump or fuel pump power control module). Long story short, put truck in independent repair shop I use. They diagnosed it was a defective fuel pump located in fuel tank. They told me GM technical support recommended to replace the fuel pump and fuel pump power and control module at a cost of ~$1325.00. It is my opinion this is a safety hazard and very similar if not exactly the same failure symptoms / modes as others have already reported. I requested to keep the failed parts and still have them in my possession. Please review and let me know if you need or want additional information . Best Regards, [XXX] [XXX] [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

POWER TRAIN

My truck is currently experiencing shuddering when driving. This happens at random times but is becoming more frequent. I have taken it into service shops on numerous occasions, and they have not been able to identify the cause due to my truck not exhibiting these conditions when they are diagnosing it. I have run out of funds to continually pay for diagnostic fees, so I have had to let it go until recently. Now it shudders, shifts very harshly, rpms fluctuate continuously, knocking noise when driving, and in the mornings when I first leave for work, my truck will not shift out of first without revving high in rpms. I took it to a mechanic and was told that it was my torque converter, which has now damaged my transmission. All of which I have to pay for out of pocket. These symptoms started when my vehicle was still under warranty (around 30,000 miles). I even flushed the transmission, and it did not help. This is my daily driving truck, and I use it to go to work and transport my 3 young children around. Most of our driving is done on the highway at high speeds (70 mph). When my truck shudders or shifts harshly, I feel that it is going to cause me to lose control or wreck, putting not only my life but my children's lives in danger. I have not consulted a lawyer, as I do not have enough money to do so. I have not had the manufacturer look at it, because when I called about it, they told me I would have to pay for all service fees since it is out of warranty. The only warning lamps I get is when it goes into limp mode (which is at least once or twice a month) and by the time I used to get it to a mechanic, the light was off and they said there is nothing they could do about it. All of this has been happening to some degree since it was around 30,000 miles and only getting worse. The fact that I have put over $20,000 into this (not including my monthly payments of $990) and now have to replace the transmission & torque converter is ridiculous.

PARKING BRAKE

The contact owns a 2019 GMC Sierra 1500. The contact stated that while driving on three occasions and stopped, the vehicle started shaking abnormally. The check engine warning light was illuminated, and the message to "Check Parking Brake" was displayed. The contact engaged and disengaged the parking brake. The vehicle was taken to the dealer where it was diagnosed and determined that the lifers and cam shaft needed to be replaced. The vehicle was repaired. The manufacturer was notified of the failure. The failure mileage was 74,000.

ENGINE

The contact owns a 2019 GMC Sierra 1500. The contact stated that while driving on three occasions and stopped, the vehicle started shaking abnormally. The check engine warning light was illuminated, and the message to "Check Parking Brake" was displayed. The contact engaged and disengaged the parking brake. The vehicle was taken to the dealer where it was diagnosed and determined that the lifers and cam shaft needed to be replaced. The vehicle was repaired. The manufacturer was notified of the failure. The failure mileage was 74,000.

ENGINE

Engine failure; according to GM Mechanics, the lifters failed and this resulted in a broken push rod. Vehicle is now waiting for a new engine; $8,882.00 out of pocket from owner, because current recall does not include the 2019 or 2020; only the 2021 and newer of the same enginee, with the same exact failures. Vehicle has under 75,000 miles and has been serviced for oil change and engine maintenance at GM dealership since purchased. Several different mechanics, on with over 40 years of GM Engine experience, have evaluated the engine all deeming the same failure. Dealership confirms that there is a 6 to 8 week lead time for the new engine because, quote, "there are so many being replaced for the existing recall". I received no warning from the vehicle systems, no information from the local GM dealership or any other communication that my vehicle was at risk for this failure. I am without a vehicle for likely 2 months and will be 'out of pocket' almost $9,000.00 when this is done. This is my second Sierra Denali 1500 in the past 10 years, and my >10th GM vehicle to own, and for the 'Premium Pick-up Truck' on the market, I have always expected the finest quality and service, and this situation changes everything.

POWER TRAIN

I bought my 2019 GMC Sierra in August of 2019. It had 3000 miles when I bought it. It now has 59000 miles on it and is in the shop today for transmission repair. The authorized dealer has flushed the transmission and I am waiting for a call back. The flush will be in the $500+ range and they charge a $165 diagnostic fee also. The transmission shudders, knocks and grabs when I accelerate. It feels like I have been rear ended. It also leaps from a complete stop. It doesn't accelerate smoothly. I feel this is a dangerous situation. I have called GMC Customer Service to complain and they have escalated to someone who is going to call me back in 24-48 hours.

ENGINE

Engine failure while driving.

ENGINE AND ENGINE COOLING

The contact owns a 2019 GMC Sierra 1500. The contact stated that while driving approximately 10 MPH, there was an audible chime heard, and the message "Stop Engine - Zero Oil Pressure" was displayed on the instrument panel. The vehicle was turned off and towed to a dealer, where it was diagnosed that the engine had seized due to a lack of engine oil. The contact was informed that the engine oil cooler line had detached from the crimp and that the engine needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was approximately 80,000.

FUEL/PROPULSION SYSTEM

Subject: Urgent Vehicle Safety Complaint – 2019 GMC Sierra Denali Escalating mechanical and electrical failures — many beginning before 100,000 miles, and continuing as of today, at approximately 110,000 miles. These issues have made the vehicle unreliable and unsafe to drive. Since purchasing the vehicle, I have had it serviced regularly and reported that it was driving rough, jerking into gear, and showing early signs of engine and transmission problems. These issues were noted during multiple multipoint inspection services, yet no lasting solutions were provided. Major issues have included: •Engine performance failures •Fuel injector malfunction •Serpentine belt and idler pulley damage •A/C compressor belt failure •Power steering malfunctions •Vehicle stalling at traffic lights •Loss of power on major highways •Rear window water leaks •Significant and ongoing electrical system problems •Shaking when brakes applied after having brakes and rotors replace in March •Screen monitor going out after paying over $ 900 dollars for updated software and repairs to the electronic component that cost over $2500. Despite continued maintenance, on Thursday, July 3, 2025, my truck began losing power and smoking heavily while driving on a busy highway in Georgia. My grandchild, who was riding with me, yelled, “Grandma, it’s smoking — please get out!” as we pulled off the road in fear of a fire. This terrifying incident left us stranded and emphasized just how dangerous this vehicle has become. I filed a formal complaint with the GMC Corporate Office, but no support provided or an investigation. Over the past six months, I have spent more than $5,000 trying to keep this vehicle operational. So many critical systems have failed, despite consistent maintenance, raises serious concerns. Finally, the fuel injector repaired 3 days later a message on dashboard displaying service Tire monitor system and steering wheel shaking when brakes are applied.

ENGINE

Subject: Urgent Vehicle Safety Complaint – 2019 GMC Sierra Denali Escalating mechanical and electrical failures — many beginning before 100,000 miles, and continuing as of today, at approximately 110,000 miles. These issues have made the vehicle unreliable and unsafe to drive. Since purchasing the vehicle, I have had it serviced regularly and reported that it was driving rough, jerking into gear, and showing early signs of engine and transmission problems. These issues were noted during multiple multipoint inspection services, yet no lasting solutions were provided. Major issues have included: •Engine performance failures •Fuel injector malfunction •Serpentine belt and idler pulley damage •A/C compressor belt failure •Power steering malfunctions •Vehicle stalling at traffic lights •Loss of power on major highways •Rear window water leaks •Significant and ongoing electrical system problems •Shaking when brakes applied after having brakes and rotors replace in March •Screen monitor going out after paying over $ 900 dollars for updated software and repairs to the electronic component that cost over $2500. Despite continued maintenance, on Thursday, July 3, 2025, my truck began losing power and smoking heavily while driving on a busy highway in Georgia. My grandchild, who was riding with me, yelled, “Grandma, it’s smoking — please get out!” as we pulled off the road in fear of a fire. This terrifying incident left us stranded and emphasized just how dangerous this vehicle has become. I filed a formal complaint with the GMC Corporate Office, but no support provided or an investigation. Over the past six months, I have spent more than $5,000 trying to keep this vehicle operational. So many critical systems have failed, despite consistent maintenance, raises serious concerns. Finally, the fuel injector repaired 3 days later a message on dashboard displaying service Tire monitor system and steering wheel shaking when brakes are applied.

ELECTRICAL SYSTEM

Subject: Urgent Vehicle Safety Complaint – 2019 GMC Sierra Denali Escalating mechanical and electrical failures — many beginning before 100,000 miles, and continuing as of today, at approximately 110,000 miles. These issues have made the vehicle unreliable and unsafe to drive. Since purchasing the vehicle, I have had it serviced regularly and reported that it was driving rough, jerking into gear, and showing early signs of engine and transmission problems. These issues were noted during multiple multipoint inspection services, yet no lasting solutions were provided. Major issues have included: •Engine performance failures •Fuel injector malfunction •Serpentine belt and idler pulley damage •A/C compressor belt failure •Power steering malfunctions •Vehicle stalling at traffic lights •Loss of power on major highways •Rear window water leaks •Significant and ongoing electrical system problems •Shaking when brakes applied after having brakes and rotors replace in March •Screen monitor going out after paying over $ 900 dollars for updated software and repairs to the electronic component that cost over $2500. Despite continued maintenance, on Thursday, July 3, 2025, my truck began losing power and smoking heavily while driving on a busy highway in Georgia. My grandchild, who was riding with me, yelled, “Grandma, it’s smoking — please get out!” as we pulled off the road in fear of a fire. This terrifying incident left us stranded and emphasized just how dangerous this vehicle has become. I filed a formal complaint with the GMC Corporate Office, but no support provided or an investigation. Over the past six months, I have spent more than $5,000 trying to keep this vehicle operational. So many critical systems have failed, despite consistent maintenance, raises serious concerns. Finally, the fuel injector repaired 3 days later a message on dashboard displaying service Tire monitor system and steering wheel shaking when brakes are applied.

ENGINE

Check engine light came on for the first time. Engine started knocking, had loss in power, took it to the closest shop. Initial report was lifter failure, after taking apart the engine for lifter replacement they deduced the bad lifters also were accompanied by camshaft damage, and bad heads. Overall resulting in engine replacement being required. Again, first time the check engine light has come on.

POWER TRAIN

Component/System that failed: The issue appears to originate from the transmission or drivetrain, specifically resulting in the rear wheels locking up and dragging at low speeds. It feels like something is seizing inside the drivetrain, making the truck very difficult to move. The vehicle is available for inspection upon request. How safety was put at risk: This failure presents a serious and unpredictable safety hazard. The vehicle begins locking up randomly when slowing down, such as in parking lots or residential areas. If this occurred at higher speeds or in traffic, it could easily result in a crash, loss of control, or pedestrian injury. It’s completely unreliable and unsafe to operate in this condition. Has the problem been reproduced or confirmed by a dealer or service center? The issue is part of a well-known transmission defect affecting GM’s 8-speed automatic transmissions. There are multiple class action lawsuits and thousands of consumer complaints documenting identical symptoms. GM is fully aware of the defect but has refused to issue a recall, instead allowing the time-based warranty to expire even when the mileage is still well within the 60,000-mile limit. My local GMC dealer refused to offer a loaner or goodwill repair and quoted over a week just to diagnose it despite knowing that this is a known failure point. The symptoms are consistent with the known defect GM continues to avoid addressing. Has it been inspected by the manufacturer, police, or insurance? No outside inspection has occurred yet. Given the widespread documentation of this defect and the consistency of symptoms, it should not be necessary to involve other parties. Were there any warning lamps or messages? No. There were no warning lights, messages, or alerts of any kind. The failure occurs randomly, and without any prior indication. That unpredictability makes the issue even more dangerous.

POWER TRAIN

The contact owns a 2019 GMC Sierra 1500. The contact stated that while driving at various speeds, the vehicle would intermittently hesitate upon depression of the accelerator pedal. The contact also stated that the check engine warning light had flashed on the instrument panel. The contact took the vehicle to an independent mechanic, where the mechanic informed the contact that there was a miscommunication between the engine and the transmission. Two dealers were notified of the failure, and each informed the contact that there were no recalls on the vehicle. The contact was also given a diagnostic fee to determine the cause of the failure; however, the vehicle was not diagnosed or repaired. The manufacturer was not notified of the failure. The failure mileage was unknown.

ENGINE

The contact owns a 2019 GMC Sierra 1500. The contact stated that while driving at various speeds, the vehicle would intermittently hesitate upon depression of the accelerator pedal. The contact also stated that the check engine warning light had flashed on the instrument panel. The contact took the vehicle to an independent mechanic, where the mechanic informed the contact that there was a miscommunication between the engine and the transmission. Two dealers were notified of the failure, and each informed the contact that there were no recalls on the vehicle. The contact was also given a diagnostic fee to determine the cause of the failure; however, the vehicle was not diagnosed or repaired. The manufacturer was not notified of the failure. The failure mileage was unknown.

ELECTRICAL SYSTEM

The contact owns a 2019 GMC Sierra 1500. The contact stated while driving approximately 45 MPH, the message "Battery Saver Alert" was displayed on the instrument cluster. The contact stated that the battery gauge was reading 9V on the 12V battery. The vehicle was driven to a dealer. The dealer diagnosed the vehicle and determined that a battery tender was needed. The contact asked the dealer to check the 12-Volt battery which was replaced 2 years prior by the same dealer. The dealer diagnosed the vehicle and determined that the alternator needed to be replaced. The contact was later informed that the battery fuse also needed to be replaced. The vehicle was repaired. The manufacturer was not informed of the failure. The contact researched online and related the failure to NHTSA Campaign Number: 19V888000 (Electrical System); however, the VIN was not included in the recall. The failure mileage was 43,742.

ENGINE

While traveling on the freeway at freeway speeds and with the cruise control on, on 7/22/2025, my vehicle abruptly start making an odd noise, the steering wheel started to vibrate / move as if I had a flat tire. I safely existed the freeway and pulled over to investigate, there was no flat tire yet the vehicle still made the noise and experienced issues when the throttle was applied. I proceeded to call a tow truck, and have the vehicle towed from Alpine, CA to Temecula and Temecula Valley GMC. While there the dealership gave me an initial diagnosis of "Miss fire in cylinder 8". We left the vehicle, and awaited more information. The next day I received a phone call stating that they needed to do an engine teardown to completely diagnose the issue, to the tune of approx. $1,500. In the dealers words, they needed to do the teardown to determine if "They could salvage the engine, or if it had to be condemned". The following day I received another call stating that the engine needed to be completely replaced due to a collapsed cylinder. The estimate for this work is over $13,000. the truck is 6 years old with 58,XXX miles.

ENGINE

Yates GMC Replaced my engine a couple of years ago under warranty and my truck has never been the same. I’ve been to the dealer multiple times. The drive, the way it operates always making cranking snapping sounds.

ENGINE AND ENGINE COOLING

The contact owns 2019 GMC Sierra 1500. The contact stated while reversing and depressing the brake pedal, the vehicle stalled. The contact shifted to park(P), turned off and restarted the vehicle, but the failure persisted. The vehicle was towed to an independent mechanic, where the starter was replaced, and the contact was informed that the engine needed to be replaced. The vehicle was then towed to the dealer, where it was diagnosed that the engine had failed and needed to be replaced. The vehicle was not repaired. The contact related the failure to NHTSA Action Number: PE25001 (Engine, Engine and Engine Cooling). The manufacturer was notified of the failure, but no assistance was provided. The failure mileage was 84,000.

STEERING

Power Steering failure. Loss of power steering while driving the vehicle made any turns nearly impossible. Dealership identified root cause and a problem with a grounding strap. They reported that in addition to our vehicle, another GMC Sierra 1500 had come in the same day with the same problem. Loss of power steering while driving can lead to collision. This should be a safety recall.

POWER TRAIN

Had to have transmission rebuilt found metal shavings and was shifting bad and shuttering. Vehicle Has 63,000 miles and is well maintained. Vehicle was taken to GMC but said their transmission person was on vacation for 2 weeks. Also parts dept Said they had no transmissions in stock and were back ordered. Truck was taken to AAMco and transmission was rebuilt And torque converter replaced . This is a common issue with GMC trucks.

UNKNOWN OR OTHER

On or around July 12th 2025 at low speed of 2-4 mph my rear end locked up sending everyone in the vehicle hard stop forward. The vehicle wouldn't disengage leaving me no choice but to have it towed for the second time 1st time happened exactly the same about month and a half prior. Gmc service department department claims they couldn't find anything wrong after it sat for two days in there lot after having it towed they were closed weekends and looked at it that Monday morning finding no signs of anything wrong. After picking up my vehicle I strongly feel like if at higher speeds or even environment this issue will endanger myself passengers and bystanders. I need help with resolving this safety issues asap please. Gmc hasn't been much help service department nor Gm support options.

BACK OVER PREVENTION: WARNINGS

On or around July 12th 2025 at low speed of 2-4 mph my rear end locked up sending everyone in the vehicle hard stop forward. The vehicle wouldn't disengage leaving me no choice but to have it towed for the second time 1st time happened exactly the same about month and a half prior. Gmc service department department claims they couldn't find anything wrong after it sat for two days in there lot after having it towed they were closed weekends and looked at it that Monday morning finding no signs of anything wrong. After picking up my vehicle I strongly feel like if at higher speeds or even environment this issue will endanger myself passengers and bystanders. I need help with resolving this safety issues asap please. Gmc hasn't been much help service department nor Gm support options.

ENGINE

On 7/17/25 vehicle was taken to Star Buick/GMC in Easton PA for rear brakes and an oil change. This vehicle has 49,981 miles on it. I was told after the oil change the tech took the truck for a test drive. I was told he made it about 20 feet and the engine seized. Either the tech forgot to refill the crank case or it is another GM 6.2 disaster. Please advise as the dealer is quoting over 12K to replace engine.

ENGINE

My 2019 GMC Sierra 1500 truck exhibiting all the same signs as the recent call for the same 2021 truck recall according to the dealership. This is for the L87 V8 engine. The 2021 engine was used in the 2019 trucks but again the 2019 trucks are not a part of the recall. My repair bill is upwards of $10,000 and diagnostics is upwards for $4,000 even though all are aware of the recent recall and my truck having the same engine.

ENGINE

The contact owns a 2019 Chevrolet Silverado 1500. The contact stated that while driving 70 MPH, there was an abnormally loud sound coming from the engine compartment before the vehicle lost automotive power. The vehicle was towed to the local mechanic who diagnosed the vehicle with engine failure. The contact was advised that the engine needed to be replaced. The vehicle was not yet repaired. The manufacturer and local dealer were not notified of the failure. The failure mileage was 126,000.

ENGINE

Vehicle motor suddenly stopped working. Vehicle was pulled into a driveway safely then wouldn’t crank anymore.

ENGINE

The contact owns a 2019 GMC Sierra 1500. The contact stated that while driving on the highway at 60 MPH, there was an abnormal knocking sound coming from the engine. There was no warning light illuminated. The vehicle was taken to a local dealer where the vehicle was diagnosed, and the contact was advised that the camshaft and lifters were faulty and needed to be replaced. The vehicle was repaired. The manufacturer was notified of the failure. The approximate failure mileage was 73,000.

ENGINE

Truck is at the Jim Gauthier GMC dealership on Mcphillips in Winnipeg, Canada. Engine endured catastrophic failure and is currently waiting for a new engine.

FUEL/PROPULSION SYSTEM

- 6.2 engine lost propulsion & warninng light on dash flashed about 3-5 times. After that the trucks engine completely malfunctioned. When this happened i was traveling at 70mhp on interstate I-69 when the the truck lost power to the engine, steering and power braking. The truck was inspected by a GM dealer and they found the engine had blown & with that it caused damage to the coolant system & to the catalytic converterin which all was replaced at full customer cost. Prior to the engine failure 2 other times it lost power and had a rough ilde and trouble starting . 1st time the dealer could not replacate the issue the next time found a camshaft postioning sensor was bad which was placed at customer cost.

ENGINE

- 6.2 engine lost propulsion & warninng light on dash flashed about 3-5 times. After that the trucks engine completely malfunctioned. When this happened i was traveling at 70mhp on interstate I-69 when the the truck lost power to the engine, steering and power braking. The truck was inspected by a GM dealer and they found the engine had blown & with that it caused damage to the coolant system & to the catalytic converterin which all was replaced at full customer cost. Prior to the engine failure 2 other times it lost power and had a rough ilde and trouble starting . 1st time the dealer could not replacate the issue the next time found a camshaft postioning sensor was bad which was placed at customer cost.

UNKNOWN OR OTHER

I washed my truck on a Saturday and as I was driving later that morning my tailgate opened while in transit. I did not notice this until I had stopped. After a little digging I found the 2019 tailgate electric switch is prone to this problem when it gets wet. There were no warning lamps for this problem.

VEHICLE SPEED CONTROL

I was driving with my wife about to merge into traffic on the interstate when I had a huge power loss. It was a busy part of the interstate where I could have been ran over. There was a lot of traffic and was fortunate the Semi driver was alert and slowed down. I was not aware of any failures of this motor or received any notices from GM. After conducting research I found that this was a know issue that GM failed to report. My truck has been serviced regularly and until that point had not given any signs of a upcoming failure, I have read that GM is looking into other years such as 2019 which mine is. I have had no luck with GM customer care with the only response being I need to crunch the numbers from my claim advisor. I have the 6.2 L87 motor and know of the clip failure do to poor assembly and parts and debris getting into the motor causing the failure. I am looking to report this and request any assistance available. My first stop was the dealership, then GM customer care

POWER TRAIN

I was driving with my wife about to merge into traffic on the interstate when I had a huge power loss. It was a busy part of the interstate where I could have been ran over. There was a lot of traffic and was fortunate the Semi driver was alert and slowed down. I was not aware of any failures of this motor or received any notices from GM. After conducting research I found that this was a know issue that GM failed to report. My truck has been serviced regularly and until that point had not given any signs of a upcoming failure, I have read that GM is looking into other years such as 2019 which mine is. I have had no luck with GM customer care with the only response being I need to crunch the numbers from my claim advisor. I have the 6.2 L87 motor and know of the clip failure do to poor assembly and parts and debris getting into the motor causing the failure. I am looking to report this and request any assistance available. My first stop was the dealership, then GM customer care

ENGINE

I was driving with my wife about to merge into traffic on the interstate when I had a huge power loss. It was a busy part of the interstate where I could have been ran over. There was a lot of traffic and was fortunate the Semi driver was alert and slowed down. I was not aware of any failures of this motor or received any notices from GM. After conducting research I found that this was a know issue that GM failed to report. My truck has been serviced regularly and until that point had not given any signs of a upcoming failure, I have read that GM is looking into other years such as 2019 which mine is. I have had no luck with GM customer care with the only response being I need to crunch the numbers from my claim advisor. I have the 6.2 L87 motor and know of the clip failure do to poor assembly and parts and debris getting into the motor causing the failure. I am looking to report this and request any assistance available. My first stop was the dealership, then GM customer care

BACK OVER PREVENTION

The contact owns a 2019 GMC Sierra 1500. The contact stated that the “Service Rearview Camera” message was displayed on the navigation display screen. The camera failed to activate while reversing. There were watermarks on the rear inside glass. The following day, the camera was operational. The contact was concerned about running over a pedestrian due to the camera being inoperable. The local dealer was not contacted. The vehicle was not diagnosed or repaired. The manufacturer was not contacted. The failure mileage was approximately 29,000.

ENGINE AND ENGINE COOLING

The contact owns a 2019 GMC Sierra 1500. The contact stated while driving 10 MPH, the vehicle made an abnormal ticking sound. The contact stated that the failure also occurred upon starting the vehicle. The vehicle was taken to the dealer, where the camshaft and lifters were replaced, and other unknown required repairs were performed. The vehicle was repaired. The contact related the failure to NHTSA Action Number: PE25001. The manufacturer was notified of the failure and informed the contact that the vehicle was not covered. The manufacturer referred the contact to the NHTSA Hotline for assistance. The failure mileage was approximately 52,029.

ENGINE

Driving down the highway at approximately 65mph, when I accelerated to 70mph my truck began to shake violently flashing a check engine light, service parking brake light, and service ESC light, the engine began to violently shake and make a rough knocking noise Had the vehicle towed to the mechanic where I was informed that the lifter on cylinder 2 had collapsed and that it would be $12,500 to replace all 16 lifters as well as the cam shaft on my engine My safety was at risk as my truck went into a “limp” mode and essentially shut off on the side of the road, others were at risk due to my truck becoming a hazard, the tow operator was at risk having to pickup my truck on the side of a 70mph freeway The only check engine code I had was a misfire on cylinder 2 Dealership stated that it was a known issue but that my truck was outside of warranty, and not apart of recall so there was nothing they could do Had truck towed to different shop that is repairing the problem Requested that all parts be kept in case of inspection request

ENGINE AND ENGINE COOLING

The contact owns a 2019 GMC Sierra 1500. The contact stated while driving at an undisclosed speed, the accelerator pedal was depressed, but the vehicle failed to accelerate as intended. There was no warning light illuminated. The vehicle was driven to the shoulder of the road. The vehicle was towed to the dealer where it was diagnosed with metal shavings in the oil pan and engine failure. The contact was informed that the engine needed to be replaced. The vehicle was not repaired. The contact related the failure to an unknown recall. The manufacturer was made aware of the failure but no assistance was provided. The contact was advised to contact the NHTSA Hotline to report the safety failure. The failure mileage was approximately 120,000.

STEERING

My 2019 GMC Sierra Denali shut off suddenly while I was stopped in traffic. The engine died, the steering wheel locked, and the dashboard displayed warning messages including “ESC,” “power,” and another I didn’t catch. The truck would not restart despite attempts. The check engine light is now on. This happened without warning, and I had no prior mechanical issues. The vehicle is well maintained, garage-kept, and recently received a full service including oil change, brake work, and 75K-mile recommended service. I fear this is related to a known issue affecting other GMC engines under investigation for sudden power loss.

ELECTRICAL SYSTEM

My 2019 GMC Sierra Denali shut off suddenly while I was stopped in traffic. The engine died, the steering wheel locked, and the dashboard displayed warning messages including “ESC,” “power,” and another I didn’t catch. The truck would not restart despite attempts. The check engine light is now on. This happened without warning, and I had no prior mechanical issues. The vehicle is well maintained, garage-kept, and recently received a full service including oil change, brake work, and 75K-mile recommended service. I fear this is related to a known issue affecting other GMC engines under investigation for sudden power loss.

ENGINE

My 2019 GMC Sierra Denali shut off suddenly while I was stopped in traffic. The engine died, the steering wheel locked, and the dashboard displayed warning messages including “ESC,” “power,” and another I didn’t catch. The truck would not restart despite attempts. The check engine light is now on. This happened without warning, and I had no prior mechanical issues. The vehicle is well maintained, garage-kept, and recently received a full service including oil change, brake work, and 75K-mile recommended service. I fear this is related to a known issue affecting other GMC engines under investigation for sudden power loss.

ENGINE

There is a common lifter failure issue with the 5.3 V8 engine in these vehicles and local mechanics I've spoken too are very aware. The 6.2L was recalled for the same reason. GM would not honor or cover any of this as it was "out of warranty", however, I strongly feel this should be investigated.

ENGINE

The engine failed and needs full replacement. Known GM issue with lifters. Engine style 6.2L. We contacted GM and they are not responsive and they provided a claim number. To repair is over 9,000$ and I still owe about 7000$ and the truck was purchased brand new. GM cannot furnish a replacement engine. The dealer showed 34 in stock when ordered. The dealer contacted us later stating GM canceled the order and they do not have an ETA when they can send an engine for the vehicle. We are paying on a vehicle that is stuck at dealer and cannot be repaired.

ENGINE

I had a 2019 GMC Sierra with a 6.2L gas engine. The engine failed while I was driving on the highway at 65 mph. The truck began shaking badly, check engine light and all kinds of warning lights came on. I pulled over and drove slowly 10 miles to a GM dealer who then told me that I should not be driving the truck due to safety concerns and it could lose power and lead to an accident. I had it towed back to my home town ($500 later) to the GMC dealer where I purchased the truck. They told me the same thing, it could not be driven. GM has since recalled vehicles with this same 6.2L engine manufactured in model years 2021-2024. I believe that recall should have included my 2019 truck. I was at risk of serious injury or death due to engine failure, fortunately I did not crash. However, I lost $14,000 in value of the truck thanks to the faulty engine. I believe the recall should be expanded and I should be compensated by GM for the engine failure. I have attached the estimate for the repair.

POWER TRAIN

I am reporting a serious mechanical and safety issue with my 2019 GMC Sierra 1500 (5.3L engine). The truck began misfiring, running rough, and would frequently “jump” and shut off while driving — creating an unsafe situation on the road. We attempted several repairs to resolve the issue: •Transmission flush •Replaced the intake manifold gasket •Replaced all eight fuel injectors •Inspected all ignition coils •Replaced faulty sensors The vehicle repeatedly showed a Cylinder 8 misfire, even after these repairs. Eventually, it was diagnosed that both the lifters and camshaft are bad, and the engine now needs a full replacement. This is extremely concerning because the truck has only about 47,000 miles on it. We brought it to the dealership in September 2024, while it was still under warranty, and told them it wasn’t running right. The dealership said there was nothing wrong. Now that the warranty has expired, GM is refusing to help with any repairs. This appears to be a manufacturing defect that was not properly diagnosed while under warranty. Engine failure at such low mileage, especially with early warning signs and repeated diagnostic errors, should be investigated as a serious reliability and safety concern.

ENGINE

I am reporting a serious mechanical and safety issue with my 2019 GMC Sierra 1500 (5.3L engine). The truck began misfiring, running rough, and would frequently “jump” and shut off while driving — creating an unsafe situation on the road. We attempted several repairs to resolve the issue: •Transmission flush •Replaced the intake manifold gasket •Replaced all eight fuel injectors •Inspected all ignition coils •Replaced faulty sensors The vehicle repeatedly showed a Cylinder 8 misfire, even after these repairs. Eventually, it was diagnosed that both the lifters and camshaft are bad, and the engine now needs a full replacement. This is extremely concerning because the truck has only about 47,000 miles on it. We brought it to the dealership in September 2024, while it was still under warranty, and told them it wasn’t running right. The dealership said there was nothing wrong. Now that the warranty has expired, GM is refusing to help with any repairs. This appears to be a manufacturing defect that was not properly diagnosed while under warranty. Engine failure at such low mileage, especially with early warning signs and repeated diagnostic errors, should be investigated as a serious reliability and safety concern.

ENGINE

The engine lifters failed with out notice twice. Upon inspection of the vehicle it was determined that there was no issues that contributed to this failure. I paid to have the problem fixed within a year the same problem happend again. I was on the expressway and my car just shut off with out warning while cruising at expressway speeds and refused to cut back on for about 2 hrs.

POWER TRAIN

Since I bought the truck, it has had transmission problems. The truck will violently jerk forward between Park - 1st - 2nd gears (up and down) pretty frequently. The dealership denied being able to recreate the issue and nothing was wrong. After dropping the vehicle off a few times, the dealer service dept said they recreated the problem and replace the torque converter. It did not work and the service dept manager told me that they knew about the problem the whole time but were instructed by General Motors to not attempt to fix the issue. I called GM Company and a supervisor eventually admitted to knowing of the transmission and engine issues all along but the GM engineers have not found a solution yet but they are working very hard to figure it out. Since those calls, my lemon law claim with BBB Auto was approved, but suddenly denied with no explanation. Following that, the #2 lifter failed and damaged the cam shaft. All were replaced and that was at 70,000 miles. The transmission has not been fixed.

FUEL/PROPULSION SYSTEM

Since I bought the truck, it has had transmission problems. The truck will violently jerk forward between Park - 1st - 2nd gears (up and down) pretty frequently. The dealership denied being able to recreate the issue and nothing was wrong. After dropping the vehicle off a few times, the dealer service dept said they recreated the problem and replace the torque converter. It did not work and the service dept manager told me that they knew about the problem the whole time but were instructed by General Motors to not attempt to fix the issue. I called GM Company and a supervisor eventually admitted to knowing of the transmission and engine issues all along but the GM engineers have not found a solution yet but they are working very hard to figure it out. Since those calls, my lemon law claim with BBB Auto was approved, but suddenly denied with no explanation. Following that, the #2 lifter failed and damaged the cam shaft. All were replaced and that was at 70,000 miles. The transmission has not been fixed.

ENGINE

Since I bought the truck, it has had transmission problems. The truck will violently jerk forward between Park - 1st - 2nd gears (up and down) pretty frequently. The dealership denied being able to recreate the issue and nothing was wrong. After dropping the vehicle off a few times, the dealer service dept said they recreated the problem and replace the torque converter. It did not work and the service dept manager told me that they knew about the problem the whole time but were instructed by General Motors to not attempt to fix the issue. I called GM Company and a supervisor eventually admitted to knowing of the transmission and engine issues all along but the GM engineers have not found a solution yet but they are working very hard to figure it out. Since those calls, my lemon law claim with BBB Auto was approved, but suddenly denied with no explanation. Following that, the #2 lifter failed and damaged the cam shaft. All were replaced and that was at 70,000 miles. The transmission has not been fixed.

POWER TRAIN

I was headed out of town and stopped in the neighborhood at a stop sign. As usual, the Auto Stop/Auto Start feature turned the engine off and when I lifted my foot off the brake pedal to reengage the engine, the truck started rolling backward. The engine would not start even though all the gauges and systems were working as if the engine was on. I had the truck towed to my mechanic and after troubleshooting, they determined the engine was locked up and would need to be totally replaced. My truck has the 6.2L gas engine and have since learned that GMC is recalling later model trucks with this engine in them due to engine failure. If my engine failure had happened anywhere other than at a stop sign in a neighborhood, it could have caused a significant accident. I can't find a new engine because of the GMC recall and the cost to replace the engine with a lower mileage, used engine is approximately $16,500.

ENGINE

The contact owns a 2019 GMC Sierra 1500. The contact stated that while driving at an undisclosed speed and slowing down to stop, the vehicle suddenly shut off and failed to restart. The vehicle was eventually towed to the residence. The cause of the failure was not yet determined. The manufacturer was notified of the failure, but no assistance was offered. The local dealer was not yet contacted. The contact was informed of the NHTSA Action Number: PE25001 (ENGINE, ENGINE AND ENGINE COOLING). The contact stated that the vehicle had experienced the failure listed in the NHTSA Action Number. The failure mileage was 115,000.

ENGINE AND ENGINE COOLING

The contact owns a 2019 GMC Sierra 1500. The contact stated that while driving at an undisclosed speed and slowing down to stop, the vehicle suddenly shut off and failed to restart. The vehicle was eventually towed to the residence. The cause of the failure was not yet determined. The manufacturer was notified of the failure, but no assistance was offered. The local dealer was not yet contacted. The contact was informed of the NHTSA Action Number: PE25001 (ENGINE, ENGINE AND ENGINE COOLING). The contact stated that the vehicle had experienced the failure listed in the NHTSA Action Number. The failure mileage was 115,000.

ENGINE

I was driving down the road no lights on the dash, when suddenly the dash lit up saying shift to park to restart. Ended up having to hurry and shift to neutral in order for the vehicle to not cause an wreck and coasted into parking lot. I tried to restart my truck and engine would not start. Had it towed to a dealership and lifters had ate through the cam shaft. Luckily I had an extended warranty and only had to pay a deductible for a new engine. They put a new engine in and I already have a rattle coming from it with less then 10,000 miles on it.

SERVICE BRAKES

This is a second report of an issue that first happened in February 2025, the dealer replaced the battery and called it fixed. On Friday 5-2-2025 I started the vehicle and as I was driving the dash lit up with these warnings: Service Trailer brake system, Service ESC, Brake System Failure 62 mph top speed, Steering assist reduced drive with care, The vehicle steering got stiff and brake pedal went to the floor board with a little braking available if I stood very hard on the brake pedal. I got off to the side of the road, cycled the truck on and off and was able to drive off. It did this three times before I could get it to the dealer the next day, If my daughter was driving I would have expected that two of the three would have resulted in a wreck as she would not have been strong enough to steer or stop the vehicle. The dealer had it three days and replaced the brake master cylinder and called it fixed, I picked the vehicle up and on the way home I stopped for gas, after the gas station the dash displayed: Service brake assist, I turned right around and took it back to the dealer, they checked the code and said the brake assist module was drawing too much current, I picked the vehicle back up three days later, they said they bleed the air out of the brake system and called it fixed. No one wants to ride with me and my daughter is begging me to trade the truck, they call it a death trap waiting to happen. GM says it is all normal issues.

STEERING

This is a second report of an issue that first happened in February 2025, the dealer replaced the battery and called it fixed. On Friday 5-2-2025 I started the vehicle and as I was driving the dash lit up with these warnings: Service Trailer brake system, Service ESC, Brake System Failure 62 mph top speed, Steering assist reduced drive with care, The vehicle steering got stiff and brake pedal went to the floor board with a little braking available if I stood very hard on the brake pedal. I got off to the side of the road, cycled the truck on and off and was able to drive off. It did this three times before I could get it to the dealer the next day, If my daughter was driving I would have expected that two of the three would have resulted in a wreck as she would not have been strong enough to steer or stop the vehicle. The dealer had it three days and replaced the brake master cylinder and called it fixed, I picked the vehicle up and on the way home I stopped for gas, after the gas station the dash displayed: Service brake assist, I turned right around and took it back to the dealer, they checked the code and said the brake assist module was drawing too much current, I picked the vehicle back up three days later, they said they bleed the air out of the brake system and called it fixed. No one wants to ride with me and my daughter is begging me to trade the truck, they call it a death trap waiting to happen. GM says it is all normal issues.

ELECTRICAL SYSTEM

Ok I know my vin don't go under the 10 recalls for 2019 gmc sierra limited 1500 rwd, but my truck has the same problem with the brake module has those recalls I feel like gmc might have used different parts for the other recall but used the same brake module for my truck cause I have that same problem has the recall. It's obviously a issue that needs to be look in and my brake module should be fixed by gmc

SERVICE BRAKES

Ok I know my vin don't go under the 10 recalls for 2019 gmc sierra limited 1500 rwd, but my truck has the same problem with the brake module has those recalls I feel like gmc might have used different parts for the other recall but used the same brake module for my truck cause I have that same problem has the recall. It's obviously a issue that needs to be look in and my brake module should be fixed by gmc

ENGINE

My engine suffered a catastrophic failure, at 139468 miles. 2019 GMC Sierra Denali 1500. I had the engine replaced with a new engine date June 2024 GMC 6.2 engine failures is happening with more than just 21-24 models years.

ENGINE

I am writing to formally document an ongoing and serious issue with our 2019 GMC Sierra 1500 (VIN: [XXX] ), which I strongly believe may be related to the current GM recall involving L87 V8 engines—despite my vehicle not yet being included. Early last year, our family experienced a sudden and frightening loss of power while driving at full speed on a curve, with our children and their car seats secured in the back. The vehicle lost power abruptly, accompanied by a loud ticking noise from the engine. This incident could have easily led to a serious accident and was terrifying for all of us. Since that time, the truck has spent more than half the year in and out of repair shops. The initial repair estimate was nearly $20,000—unmanageable for us, especially since the vehicle is paid off. Fortunately, a family friend was able to repair it for significantly less, but the problems have persisted. Most recently, the check engine light returned and we experienced another episode of reduced power, suggesting an unresolved or recurring failure likely tied to internal engine components such as the long block, crankshaft, connecting rods, timing chain, or camshaft. This truck is essential for our family’s daily life—including commuting to work and school, and especially out-of-town travel. Our other vehicle, a 2007 Honda Accord, is much smaller and insufficient for our growing family. This ongoing issue has caused substantial disruption, stress, and financial strain. It has also delayed our ability to upgrade to a larger family vehicle, something we had planned and budgeted for before this ordeal. Given the severity and duration of the issue—and its apparent connection to the same engine problems affecting newer models—we want to ensure this situation is documented with the NHTSA and GM. We sincerely hope that the scope of the current recall will be expanded, and that appropriate relief or support will be offered to affected vehicle owners like us. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.

ENGINE

I was driving on the highway at 60mph and the engine shut off. I was fortunate enough to be able to get the truck off the road without incident. The instruments instructed me to try to start the vehicle again. Upon doing so the engine made very loud and erratic knocking noises and I shut it off. I towed the truck to the GMC dealership where they told me the engine had thrown 2 rod bearings. They told me this was VERY common with the 6.2L engine. The truck was extremely well maintained with all services at the dealership, and only had 70,000 miles on it. GM quoted me $15,436.00 to replace the engine. I did open a case with GM when the incident occurred. Case # [XXX]

FUEL/PROPULSION SYSTEM

I’m contacting you regarding my 2019 GMC Sierra 1500 with the 5.3L V8 engine. The vehicle is currently experiencing a cylinder 8 misfire (code P0308), accompanied by engine backfiring, ticking noise, and exhaust fumes inside the cabin. Additionally, the ESC (Electronic Stability Control) warning light is on, and performance is noticeably affected. To date, I have: •Replaced all spark plugs and fuel injectors •Verified proper ignition coil function •Had an oil change on September 23, 2024, during which I reported early concerns about engine performance (shortly after the powertrain warranty expired) •Had a transmission flush on March 17, 2025, in an attempt to resolve continued drivability issues Despite these efforts, the issue persists. Given the known issues with AFM lifters and camshaft wear on this engine, I suspect a mechanical failure related to that system.

ENGINE

I’m contacting you regarding my 2019 GMC Sierra 1500 with the 5.3L V8 engine. The vehicle is currently experiencing a cylinder 8 misfire (code P0308), accompanied by engine backfiring, ticking noise, and exhaust fumes inside the cabin. Additionally, the ESC (Electronic Stability Control) warning light is on, and performance is noticeably affected. To date, I have: •Replaced all spark plugs and fuel injectors •Verified proper ignition coil function •Had an oil change on September 23, 2024, during which I reported early concerns about engine performance (shortly after the powertrain warranty expired) •Had a transmission flush on March 17, 2025, in an attempt to resolve continued drivability issues Despite these efforts, the issue persists. Given the known issues with AFM lifters and camshaft wear on this engine, I suspect a mechanical failure related to that system.

ELECTRICAL SYSTEM

I’m contacting you regarding my 2019 GMC Sierra 1500 with the 5.3L V8 engine. The vehicle is currently experiencing a cylinder 8 misfire (code P0308), accompanied by engine backfiring, ticking noise, and exhaust fumes inside the cabin. Additionally, the ESC (Electronic Stability Control) warning light is on, and performance is noticeably affected. To date, I have: •Replaced all spark plugs and fuel injectors •Verified proper ignition coil function •Had an oil change on September 23, 2024, during which I reported early concerns about engine performance (shortly after the powertrain warranty expired) •Had a transmission flush on March 17, 2025, in an attempt to resolve continued drivability issues Despite these efforts, the issue persists. Given the known issues with AFM lifters and camshaft wear on this engine, I suspect a mechanical failure related to that system.

STEERING

2019 GMC SIERRA 1500 AT4 2019 VIN: [XXX] On 10/31/2023 the transmission was replaced at Mileage: 72,875. The transmission at Jim Ellis Buick, GMC, after the truck would not drive over 40 miles in speeded. 12/23/23, 86788215, Engine Oil Cooler Hose had to be changed. Truck had to be towed from a public parking lot to the mechanic. The engine is burning oil, the warning messages say add oil, I have been adding oil once a month 1 quart. The steering wheel was locked and the truck had to be towed from a public parking lot to the mechanic. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

ENGINE

2019 GMC SIERRA 1500 AT4 2019 VIN: [XXX] On 10/31/2023 the transmission was replaced at Mileage: 72,875. The transmission at Jim Ellis Buick, GMC, after the truck would not drive over 40 miles in speeded. 12/23/23, 86788215, Engine Oil Cooler Hose had to be changed. Truck had to be towed from a public parking lot to the mechanic. The engine is burning oil, the warning messages say add oil, I have been adding oil once a month 1 quart. The steering wheel was locked and the truck had to be towed from a public parking lot to the mechanic. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

POWER TRAIN

2019 GMC SIERRA 1500 AT4 2019 VIN: [XXX] On 10/31/2023 the transmission was replaced at Mileage: 72,875. The transmission at Jim Ellis Buick, GMC, after the truck would not drive over 40 miles in speeded. 12/23/23, 86788215, Engine Oil Cooler Hose had to be changed. Truck had to be towed from a public parking lot to the mechanic. The engine is burning oil, the warning messages say add oil, I have been adding oil once a month 1 quart. The steering wheel was locked and the truck had to be towed from a public parking lot to the mechanic. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

ENGINE

2019 GMC Sierra AT4 with 6.2L engine failed while driving 45 mph. No warnings and no check engine lights prior to engine failure. Coasted off the road, engine would not restart. Upon attempted restart the check engine light came on showing code P0016 for crankshaft/camshaft position sensor. Towed vehicle to dealership where engine replacement was required.

ELECTRICAL SYSTEM

Just purchased this vehicle, at 84000 miles had engine failure and electrical issues while traveling down interstate with my family. Lost power steering and all warning lights popped up. Safely exited busy interstate -- avoided major accident. This engine should have been included in the recent GMC recall - After a diagnostic $7000.00 plus to fix. UNSAFE ENGINE ISSUE!! Please help the consumer!!

ENGINE

Just purchased this vehicle, at 84000 miles had engine failure and electrical issues while traveling down interstate with my family. Lost power steering and all warning lights popped up. Safely exited busy interstate -- avoided major accident. This engine should have been included in the recent GMC recall - After a diagnostic $7000.00 plus to fix. UNSAFE ENGINE ISSUE!! Please help the consumer!!

SERVICE BRAKES

Ebcm software update errors

SERVICE BRAKES

6.2L v8 the same as 2021 to 2024 engine built the same way and im experiencing the same issues and the dealership wont fix it , i would like to get a response if this will be included or should i file a lawsuit and take legal action thank you

ENGINE

6.2L v8 the same as 2021 to 2024 engine built the same way and im experiencing the same issues and the dealership wont fix it , i would like to get a response if this will be included or should i file a lawsuit and take legal action thank you

POWER TRAIN

While driving down the highway I experienced a sudden lose of power with check engine and other associated warning lights immediately illuminated. It has been confirmed by my independent service center and a GMC dealer that the engine lifters and camshaft failed. I have documentation to prove the vehicle has been traded to a GMC dealer. My safety and the safety of other divers around me was put at risk as I abruptly lost power at highway speeds and this caused traffic around me to slow very quickly and swerve to avoid collision. Serious personal and public injury or death was narrowly avoided due to the quick response of other drivers. I had to limp the vehicle to a safe place to exit the highway and avoid further danger. After speaking with the dealer and my independent maintenance professional I can say that the problem was showing eminent failure, for about a year there was a tik I was hearing that in the past had been described as the "GM TIK" some mechanics said it was normal others said it might be a problem but none of them ever recommended a repair. I believe this is related to the problem reported by my local news agency on 4/30/2025

ENGINE

While driving down the highway I experienced a sudden lose of power with check engine and other associated warning lights immediately illuminated. It has been confirmed by my independent service center and a GMC dealer that the engine lifters and camshaft failed. I have documentation to prove the vehicle has been traded to a GMC dealer. My safety and the safety of other divers around me was put at risk as I abruptly lost power at highway speeds and this caused traffic around me to slow very quickly and swerve to avoid collision. Serious personal and public injury or death was narrowly avoided due to the quick response of other drivers. I had to limp the vehicle to a safe place to exit the highway and avoid further danger. After speaking with the dealer and my independent maintenance professional I can say that the problem was showing eminent failure, for about a year there was a tik I was hearing that in the past had been described as the "GM TIK" some mechanics said it was normal others said it might be a problem but none of them ever recommended a repair. I believe this is related to the problem reported by my local news agency on 4/30/2025

POWER TRAIN

The contact owns a 2019 GMC Sierra 1500. The contact stated that while driving at an undisclosed speed, the transmission unintentionally downshifted into first gear. The contact stated that several unknown warning lights were illuminated. The vehicle was towed to a dealer, and it was diagnosed and determined that the torque converter needed to be replaced. The vehicle was repaired; however, the failure persisted. The vehicle was towed back to the dealer, where it was diagnosed and determined that the engine needed to be replaced. The vehicle was repaired; however, the failure persisted. The manufacturer was notified of the failure. The failure mileage was approximately 86,000.

ENGINE

The contact owns a 2019 GMC Sierra 1500. The contact stated that while driving at an undisclosed speed, the transmission unintentionally downshifted into first gear. The contact stated that several unknown warning lights were illuminated. The vehicle was towed to a dealer, and it was diagnosed and determined that the torque converter needed to be replaced. The vehicle was repaired; however, the failure persisted. The vehicle was towed back to the dealer, where it was diagnosed and determined that the engine needed to be replaced. The vehicle was repaired; however, the failure persisted. The manufacturer was notified of the failure. The failure mileage was approximately 86,000.

ENGINE

During city driving my L87 engine losses power during acceleration. The start and stop feature makes loud scratching noises when it starts up.

ENGINE

I was driving my truck from lunch and out no where the truck stalled and did crank back had it towed to the dealership and said needed new engine because the timing had jump..

ENGINE

Trucks engine died going down the interstate no warning lights just died. Had it towed to the GM dealer where they told me the engine failed and the oil pan was full of metal. This was after I spent $5000 at the same dealer repairing it because it wouldn’t start. It’s at Ross downing gmc in Hammond Louisiana now for the 2nd week.

ENGINE

My gmc truck was stopped on a red light on a city street and suddenly the engine just shuts off, I have to restart the truck. This is not the first time that it did that. I can't imagine if this does happen on the freeway.

ENGINE AND ENGINE COOLING

The contact owns a 2019 GMC Sierra 1500. The contact stated that while driving at an undisclosed speed, the vehicle made an abnormally loud sound and was shaking abnormal. The vehicle lost motive power and failed to restart. No warning light was illuminated. The vehicle was towed to the residence, and the battery was replaced, but the failure persisted. The vehicle was towed to the dealer, who determined that lifter #7 had no compression and that the crankshaft was bent. The vehicle was then towed to an independent mechanic, who also determined that the crankshaft was bent and needed to be replaced. The vehicle was not repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 106,000 .

ENGINE

Engine failure and loss off control resulting in me almost getting into an accident from lifter problem identification from a certified mechanic. Resulting in a $4100 repair

ENGINE

I was experiencing rough gear shifting jumps and low power/acceleration but it was spotty and not continuous. While I was traveling on cruise control, my truck started misfiring. Once I got home the whole truck was shaking in place. I popped the hood and noticed the engine itself was shaking on the motor mounts. On the way to the mechanic, several lights (including check engine light) came on (the codes thrown were P0300-P0308). The mechanic attempted to clean the fuel injectors (that were replaced 30k miles go due to failure as well), but that did not solve the misfire. I was told the cylinder was dead, and upon inspection of the oil filter there were metal shavings throughout it and the engine, as well as a bent cam shaft. All symptoms and issues I've experience, which resulted in a complete engine swap, are similar to those of the 2021-2024 GMC Sierra 6.2L engines that were just recalled. I would like to know how many other 2019-2020 5.3L engines have had failure before 90k due to similar issues and if there is a larger concern here.

ENGINE

Engine failed while driving on the interstate. No warning lights and no known mechanical issues. Dealership maintained vehicle. Towed to nearest GMC dealership to be inspected and repaired. Tech told me before looking at it that it was probably an engine failure. He disclosed that my model engine was problematic and engine failure was common. He was right. My family could have been killed had I not been able to guide a powerless vehicle off the road out of traffic. A replacement engine was quoted for 15k. However GM did not have any and no eta on when they would. A used engine with 80,000 miles and only a 12,000 miles warranty was offered for 11k. I could afford neither as I’m still paying 1k a month for the vehicle. They are recalling vehicles with the same engine but only back to 2021. I’ve spent over 15k to get my truck back functional. I believe good morning should be held accountable. This known issue was never disclosed to me pre purchase or I would not have paid 80k for a truck to last only 120,000 miles

ENGINE

While driving on the interstate and picking up speed from 50mph, the vehicle suddenly shuts off without any warnings and causing a safety issue of stopping immediately in traffic in the middle of the expressway.

ENGINE

Engine 6.2 liter needed to be replaced. Connecting rod and the engine froze up.

ENGINE

Engine issues at 35000 37000and failure at 65000 miles V8 6.2 L engine. Cans and lifters replaced at $6100 GM refused to cover. Car immediately traded in for 2024 Silverado same occurrence on exit ramp 15000 miles engine replaced this year under warranty. Would like recall extended warranty to 2019 or before and be reimbursed for $6100 at a minimum

ENGINE

2019 gmc sierra 5.3L engine had lifters collapse at 81k miles causing internal damage and forcing the dealership to have to replace the engine at my cost-have heard there have been many folks with the same issues

UNKNOWN OR OTHER

Bought used 2019 Denali Oct 2024 with 41 k miles on it. 1200 miles later started feeling vibration under load on highway. Took to dealership and they said I needed to replace torque converter. After that the transmission went out during test drive. Then waited 45 days for new transmission to find out the unit was defective. Now we’re going on 5 months and the truck still waiting on a replacement transmission. GM hasn’t acknowledged any of my complaints about this and said that they’re doing the best they can for me and is going to award me 10000 reward points for future use! What a joke! 5. months to replace a transmission? GM has completely failed its consumers, at least this one!

POWER TRAIN

Bought used 2019 Denali Oct 2024 with 41 k miles on it. 1200 miles later started feeling vibration under load on highway. Took to dealership and they said I needed to replace torque converter. After that the transmission went out during test drive. Then waited 45 days for new transmission to find out the unit was defective. Now we’re going on 5 months and the truck still waiting on a replacement transmission. GM hasn’t acknowledged any of my complaints about this and said that they’re doing the best they can for me and is going to award me 10000 reward points for future use! What a joke! 5. months to replace a transmission? GM has completely failed its consumers, at least this one!

ENGINE

The contact owns a 2019 GMC Sierra 1500. The contact stated that while his wife was driving at an undisclosed speed and approaching a stop, the vehicle lost motive power. There was an abnormal exhaust odor and smoke coming from the exhaust pipe. The engine and fuel lights were illuminated. The vehicle was towed to the local dealer and was diagnosed with a misfire in cylinder #5, and the exhaust lifters and camshaft needed to be replaced. The vehicle was not repaired. The manufacturer was not contacted. The failure mileage was approximately 50,000.

ENGINE AND ENGINE COOLING:EXHAUST SYSTEM

The contact owns a 2019 GMC Sierra 1500. The contact stated that while his wife was driving at an undisclosed speed and approaching a stop, the vehicle lost motive power. There was an abnormal exhaust odor and smoke coming from the exhaust pipe. The engine and fuel lights were illuminated. The vehicle was towed to the local dealer and was diagnosed with a misfire in cylinder #5, and the exhaust lifters and camshaft needed to be replaced. The vehicle was not repaired. The manufacturer was not contacted. The failure mileage was approximately 50,000.

STRUCTURE:BODY

Rear sliding glass window is leaking water around the exterior frame. This is addressed in TSB 18-NA-383 but not covered under any warranty. My rear seats and carpet are becoming wet. I am concerned about the possibility of mold and an electrical short/fire resulting from water intrusion. There are many reports and discussions on the internet regarding this issue. Full window replacement estimated at $1300. Patchwork repair with caulk is estimated at $600 with no guarantees of success. I would expect GMC to cover the replacement of the rear glass in kind and remedy any other damage to my vehicle due to water intrusion into the cabin area.

ELECTRICAL SYSTEM

Rear sliding glass window is leaking water around the exterior frame. This is addressed in TSB 18-NA-383 but not covered under any warranty. My rear seats and carpet are becoming wet. I am concerned about the possibility of mold and an electrical short/fire resulting from water intrusion. There are many reports and discussions on the internet regarding this issue. Full window replacement estimated at $1300. Patchwork repair with caulk is estimated at $600 with no guarantees of success. I would expect GMC to cover the replacement of the rear glass in kind and remedy any other damage to my vehicle due to water intrusion into the cabin area.

SEATS

Rear sliding glass window is leaking water around the exterior frame. This is addressed in TSB 18-NA-383 but not covered under any warranty. My rear seats and carpet are becoming wet. I am concerned about the possibility of mold and an electrical short/fire resulting from water intrusion. There are many reports and discussions on the internet regarding this issue. Full window replacement estimated at $1300. Patchwork repair with caulk is estimated at $600 with no guarantees of success. I would expect GMC to cover the replacement of the rear glass in kind and remedy any other damage to my vehicle due to water intrusion into the cabin area.

ENGINE

I was driving back from getting breakfast and the truck started to smoke and the truck just shut off on the street. As soon as the truck shut off, I received an alert on the dash that told me not to exceed a certain speed, but the truck was not moving at the time. I tried to restart the truck and I received another alert that said to put the truck in neutral and I ended up having to push the truck to a safe space. I call a tow truck to take the vehicle to the dealership for evaluation. I later spoke with the representative at the dealership and she told me that my 6.2L V8 engine had seized up. She could not tell me why it happened.

FUEL/PROPULSION SYSTEM

While driving My 2019 GMC Sierra I heard a loud Bang And lots of Misfires. The vehicle immediately slowed on its own causing me to pull off the road and endanger myself and traffic around me. Engine light came on and the traction control light was flashing. The Vehicle was brought to Dealer where they Diagnosed the problem all lifter rods were frozen and the cam shaft was cracked. The Dealer has the affected parts.The vehicle was in the repair shop for over two weeks and close to 7,000.00 in repairs.

ENGINE

While driving My 2019 GMC Sierra I heard a loud Bang And lots of Misfires. The vehicle immediately slowed on its own causing me to pull off the road and endanger myself and traffic around me. Engine light came on and the traction control light was flashing. The Vehicle was brought to Dealer where they Diagnosed the problem all lifter rods were frozen and the cam shaft was cracked. The Dealer has the affected parts.The vehicle was in the repair shop for over two weeks and close to 7,000.00 in repairs.

VISIBILITY/WIPER

Rear powersliding window leaks on passenger side

ENGINE

WHILE TURNING INTO A BUISNESS FROM A HIGHWAY, THE LOW FUEL WARNING CAME ON EVEN THOUGH I HAD JUST FILLED THE TANK. UPON LEAVING THE BUISNESS, I STARTED THE TRUCK AND PUT IT INTO REVERSE AND THE ENGING STALLED. RESTARTED THE TRUCK AND PUT IT INTO REVERSE AGAIN AND IT STALLED AGAIN. RESTARTED AND TRIED GOING FORWARD AND IT RAN FINE. ABOUT 1 MILE DOWN THE ROAD THE LOW FUEL WARNING CAME ON AGAIN AND THE ENGINE STALLED WHILE TRAVELING APPROXIMATELY 35 MPH. AT THIS POINT I REALIZED THAT THE DOORS HAD UNLOCKED AND THE INSTRUMENT CLUSTER GAUGES KEPT SWEEPING UP AND DOWN. I TRIED TO RESTART THE ENGINE BUT IT WOULD NOT TURN OVER. IT ACTED LIKE THE BATTERY WAS DEAD. AFTER WATING SEVERAL SECONDS, I TRIED AGAIN AND THE ENGINE RESTARTED. I NOTED THE BATTERY VOLTAGE IN THE INSTRUMENT CLUSTER AND IT WAS NORMAL. NO WARNING LIGHTS ON IN THE INSTRUMENT CLUSTER. NO DTCS PRESENT WHEN CHECKED WITH A GENERIC SCAN TOOL. MY SAFETY WAS PUT AT RISK BECAUSE THE ENGINE STALLED WHILE DRIVING IN TRAFFIC. I HAVE NOT TAKEN IT TO THE DEALER YET AS THEY ARE NOT OPEN TODAY AND I WANTED TO REPORT THIS WHILE ALL THE DETAILS WERE FRESH ON MY MIND.

ELECTRICAL SYSTEM

WHILE TURNING INTO A BUISNESS FROM A HIGHWAY, THE LOW FUEL WARNING CAME ON EVEN THOUGH I HAD JUST FILLED THE TANK. UPON LEAVING THE BUISNESS, I STARTED THE TRUCK AND PUT IT INTO REVERSE AND THE ENGING STALLED. RESTARTED THE TRUCK AND PUT IT INTO REVERSE AGAIN AND IT STALLED AGAIN. RESTARTED AND TRIED GOING FORWARD AND IT RAN FINE. ABOUT 1 MILE DOWN THE ROAD THE LOW FUEL WARNING CAME ON AGAIN AND THE ENGINE STALLED WHILE TRAVELING APPROXIMATELY 35 MPH. AT THIS POINT I REALIZED THAT THE DOORS HAD UNLOCKED AND THE INSTRUMENT CLUSTER GAUGES KEPT SWEEPING UP AND DOWN. I TRIED TO RESTART THE ENGINE BUT IT WOULD NOT TURN OVER. IT ACTED LIKE THE BATTERY WAS DEAD. AFTER WATING SEVERAL SECONDS, I TRIED AGAIN AND THE ENGINE RESTARTED. I NOTED THE BATTERY VOLTAGE IN THE INSTRUMENT CLUSTER AND IT WAS NORMAL. NO WARNING LIGHTS ON IN THE INSTRUMENT CLUSTER. NO DTCS PRESENT WHEN CHECKED WITH A GENERIC SCAN TOOL. MY SAFETY WAS PUT AT RISK BECAUSE THE ENGINE STALLED WHILE DRIVING IN TRAFFIC. I HAVE NOT TAKEN IT TO THE DEALER YET AS THEY ARE NOT OPEN TODAY AND I WANTED TO REPORT THIS WHILE ALL THE DETAILS WERE FRESH ON MY MIND.

ENGINE

I do not know if this qualifies as a safety concern, however based on everything I have read, I wanted to report the incident since you have 39 cases already. My 2019 GMC Sierra Denali w 6.2l engine, and 60,000 miles, starting tapping on April 10, 2025. I brought it to the local dealership the following day to diagnose. The dealer reported that they located metal in the oil pan/ filter and said the engine needed to be replaced. After more reading, it seems my truck is one of the vehicles with the 6.2l engine that is failing in countless numbers. In all fairness, I did not crash, the engine did not seize and it did not create a safety hazard in my incident, so i apologize if this reporting is a waste of your time. Now i have been given an invoice for over $10k to replace the engine which is on backorder nationwide I'm told due to the number of engine failures. Obviously it is out of 5 year 60K mile warranty so I have to eat the engine replacement.

ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:MANIFOLD/HEADER/MUFFLER/TAIL PIPE

The contact owns a 2019 GMC Sierra 1500. The contact stated while the vehicle was parked, the driver's side tail pipe flange bolts connecting the tail pipe and the muffler snapped, causing the tail pipe to hang down. There were no warning lights illuminated. The contact had gone underneath the vehicle and saw that the muffler was disconnected from the tail pipe and that the exhaust bolts had snapped. The dealer was contacted, and an appointment was scheduled to have the vehicle repaired; however, the vehicle was not yet repaired. The manufacturer was made aware of the failure and referred the contact to the NHTSA Hotline to report the failure. The failure mileage was approximately 107,105.

ELECTRICAL SYSTEM

I had engine failure two weeks after a schedule maintenance that included a tune up. When the engine failed all the components made the vehicle impossible to operate much less bring to a stop safely. I had to get the vehicle towed to the dealer. The dealer confirmed that the engine (6.2 V8) has a known documented issue. The vehicle is at my dealer with the engine being disassembled. There weren't any warnings as I stayed on the maintenance schedule that the dealer mapped out since my purchase. The problem began [XXX]. After researching the issue I found this online. That is how I found your web site. [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

POWER TRAIN

I had engine failure two weeks after a schedule maintenance that included a tune up. When the engine failed all the components made the vehicle impossible to operate much less bring to a stop safely. I had to get the vehicle towed to the dealer. The dealer confirmed that the engine (6.2 V8) has a known documented issue. The vehicle is at my dealer with the engine being disassembled. There weren't any warnings as I stayed on the maintenance schedule that the dealer mapped out since my purchase. The problem began [XXX]. After researching the issue I found this online. That is how I found your web site. [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

ENGINE

I had engine failure two weeks after a schedule maintenance that included a tune up. When the engine failed all the components made the vehicle impossible to operate much less bring to a stop safely. I had to get the vehicle towed to the dealer. The dealer confirmed that the engine (6.2 V8) has a known documented issue. The vehicle is at my dealer with the engine being disassembled. There weren't any warnings as I stayed on the maintenance schedule that the dealer mapped out since my purchase. The problem began [XXX]. After researching the issue I found this online. That is how I found your web site. [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

ENGINE

Engine oil coolant lines leaking at crimped fittings. Known problem on 2019 GMC Sierra Pickups 1500, under customer satisfaction program N212326940, known to affect in areas of very cold temperature weather, North Dakota where we live is extremely cold -45 deg F in winter. Risk of total oil loss and engine failure. Dealer replaced lines with no reduction in price for a known failure. Warning leaking oil on my driveway, filled engine, scheduled appointment and dealership replaced lines at full cost. This program to replace the lines at no charge should apply to all 2019 GMC 1500s that develop the leaks.

ENGINE AND ENGINE COOLING

The contact owns a 2019 GMC Sierra 1500. The contact stated that the vehicle was taken to the local dealer for a routine oil change. The dealer informed the contact that the oil level was low. The contact stated while driving at 25-30 MPH, the low oil pressure message was displayed. The contact pulled over and there was oil on the ground. There were no warning lights illuminated. The contact stated that the failure was related to NHTSA Action Number: PE25001 (Engine and Engine Cooling). The vehicle was towed to the local dealer again, where it was diagnosed that the engine needed to be replaced. The vehicle was not repaired. The manufacturer was not contacted. The approximate failure mileage was 127,000.

POWER TRAIN

I bought this vehicle at 80k miles and I have had an on going issue with the transmission. I have done research online and found that GM had put the wrong fluid in the transmission from the factory that has caused internal issues with the transmission leading to hard shifting and transmission shuttering. On my dime I have changed the fluid twice already and also the torque converter as well. This issue has gotten better but still a problem. This has caused me to not be able to trade my truck with out being upside down because of the dealers telling me they would have to put a new transmission to sell it. So now my trucks value has dropped as well. Now I am stuck in a truck that is not safe to drive. Thanks GM for not helping me.

ELECTRICAL SYSTEM

Transmission keeps skipping missing gears and hard shifting, as well as jolting forward. When attempting to switch lanes vehicle transmission skips. When being placed from Park to drive or any other gear vehicle transmission hard shifts. Vehicle radio and screen shut off intermittently every 30 to 45 minutes. Vehicle screen goes blank and black and resets itself after 30 to 45 minutes.

POWER TRAIN

Transmission keeps skipping missing gears and hard shifting, as well as jolting forward. When attempting to switch lanes vehicle transmission skips. When being placed from Park to drive or any other gear vehicle transmission hard shifts. Vehicle radio and screen shut off intermittently every 30 to 45 minutes. Vehicle screen goes blank and black and resets itself after 30 to 45 minutes.

POWER TRAIN

Transmission has been failing for the life of this vehicle. Shuttered shifting and hard shifting are the norm. It is available for inspection. Vehicle does not shift properly when vehicle is in motion. Shifting is often delayed resulting in temporary loss of power. I have had the vehicle in to a transmission shop they have been able to reproduce the events. There are no warning lights visible to indicate an issue.

ENGINE

2024 the lifters when out in the engine and were replaced 2025 the engine malfunctioned while driving on the highway. There were messages that came up of low oil pressure and the engine completely locked up The dealership is saying the engine needs to be replaced

POWER TRAIN

The contact owns a 2019 GMC Sierra 1500. The contact stated while driving 75 MPH, the vehicle occasionally downshifted or unintendedly came to a stop. There were no warning lights illuminated. The vehicle was taken to a dealer and the vehicle was diagnosed and the contact was informed that the transmission software needed to be updated. The vehicle was repaired; however, the failure persisted. The contact stated that on another occasion, the vehicle started to turn off unintendedly at traffic lights. The vehicle was taken to a different dealer and the vehicle was diagnosed and it was determined that the valve body software needed to be updated. The vehicle was repaired; however, the failure persisted. The contact stated that on another occasion, the vehicle started to vibrate violently while driving on the highway. The vehicle was taken to the original dealer and the dealer replaced the transmission; however, the failure persisted. The vehicle was taken to a different dealer and the vehicle was diagnosed with torque converter failure. The vehicle was not repaired. The manufacturer was made aware of the failure. The failure mileage was approximately 48,000.

ENGINE AND ENGINE COOLING

The contact owns a 2019 GMC Sierra 1500. The contact stated that while his wife was driving 60 MPH, the engine seized, nearly causing a crash. The driver was able to veer to the side of the road. The check engine warning light was illuminated. The vehicle failed to restart and was towed to the dealer, where it was diagnosed and determined that the engine had seized and needed to be replaced. The dealer informed the contact that the upper part of the engine was previously rebuilt, and that the current failure was related to the lower part of the engine. The dealer informed the contact that there was a cost for the repair. The manufacturer was notified of the failure and offered a discount towards the repair. The dealer later informed the contact that the manufacturer would partially cover the repair cost. The vehicle was not repaired. The contact related the failure to NHTSA Action Number: PE25001 (Engine, Engine and Engine Cooling). The failure mileage was approximately 100,000.

ENGINE

The contact owns a 2019 GMC Sierra 1500. The contact stated that while his wife was driving 60 MPH, the engine seized, nearly causing a crash. The driver was able to veer to the side of the road. The check engine warning light was illuminated. The vehicle failed to restart and was towed to the dealer, where it was diagnosed and determined that the engine had seized and needed to be replaced. The dealer informed the contact that the upper part of the engine was previously rebuilt, and that the current failure was related to the lower part of the engine. The dealer informed the contact that there was a cost for the repair. The manufacturer was notified of the failure and offered a discount towards the repair. The dealer later informed the contact that the manufacturer would partially cover the repair cost. The vehicle was not repaired. The contact related the failure to NHTSA Action Number: PE25001 (Engine, Engine and Engine Cooling). The failure mileage was approximately 100,000.

POWER TRAIN

The contact owns a 2019 GMC Sierra 1500. The contact stated while accelerating from a complete stop, the vehicle hesitated and the transmission experienced a hard shift to first gear. Additionally, the contact stated that the vehicle was shuddering while driving at slower speeds. There was no warning light illuminated. The vehicle was taken to the dealer but was not diagnosed or repaired. The manufacturer was notified of the failure and informed the contact that the VIN was not included in a related recall. The failure mileage was approximately 38,000.

ENGINE

This incident happened without any warning at all on [XXX]. while driving 45mph on county road, the engine seemed to not be firing on all cylinders. Loss of power was immediate. accompanied by a rhythmic nocking that was felt and heard. I pulled off and called a tow truck. The engine is a 5.3 liter v8. At Pete Moore Chevrolet they said it was a failure of the number 8 cylinder valve lifters. that all lifters need replaced along with the camshaft due to scarring. Found through research that this is a frequent problem with engines 2014-2021. See - [XXX] , et al, vs General Motors LLC. (brought by Berger Montague) filed in the US District court of Eastern Michigan. Alleging defective valve lifters causing near or catastrophic engine failure. NHTSA has 39 active cases as well. Contacted GM Customer Satisfaction Program 3/27/25. Case #[XXX]. Goal to see with their prior knowledge of this issue could they help repair or replace the engine. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

ENGINE

On 04-03-2025 while driving southbound in DFW International Airport. My Vehicle losses power in the Construction zone at 2:20 pm. Had enough momentum to maneuver to Terminal A exit stopping Midway up ramp. Danger to public if vehicle stopped on highway during the start of heavy traffic in construction zone with no soft shoulders for emergency's. No warnings from the cluster panel ever came up. on attempting to restart, check engine light illuminated after the fact. No Help! Vehicle is at Dealership currently awaiting further info.

POWER TRAIN

Transmission hesitates. Transmission jerks when shifting. Possible torque conversion issues. Mileage is 35,623.

BACK OVER PREVENTION: WARNINGS

I was driving down the road, got a quick message. It said something about lean and to pull over (on dashboard). And by the next stop light the engine stopped. The truck no longer turned on. It did put my life in danger because it left me stranded in between two lanes. The truck was inspected by one of my mechanic friends who owns a shop. He let me know my engine is seized.

BACK OVER PREVENTION: REARVIEW SYSTEM BRAKING

I was driving down the road, got a quick message. It said something about lean and to pull over (on dashboard). And by the next stop light the engine stopped. The truck no longer turned on. It did put my life in danger because it left me stranded in between two lanes. The truck was inspected by one of my mechanic friends who owns a shop. He let me know my engine is seized.

ENGINE

I was driving down the road, got a quick message. It said something about lean and to pull over (on dashboard). And by the next stop light the engine stopped. The truck no longer turned on. It did put my life in danger because it left me stranded in between two lanes. The truck was inspected by one of my mechanic friends who owns a shop. He let me know my engine is seized.

ELECTRICAL SYSTEM

When going to shut off vehicle, when you push the push start button the engine will turn off but the radio and all the instrument panel, gauge lights, and dinging noise are still on. It states on the screen to shift to park. The vehicle is in park and even sometimes has the parking brake on. It can stay on from 1 minute to numerous minutes, which is only running my battery and other things down on my truck. This has happened daily.

ENGINE

While I was driving the engine started to lose power on the highway going about 70 mph with my four kids in the car. I had to quickly exit the highway and pull over. I was uncomfortable continuing operating the vehicle and had to get it to the closest GMC dealership which was in Killeen Texas. (Patriot Buick GMC). Upon diagnosis, I was informed that the lifters were damaged and needed to be repaired. Once the technician started the disassembly he noticed that the lifters caused damage to the cam shaft resulting in additional repairs which totaled approximately $8700 in damages/repairs required. I started to research this as the lifters typically do not fail in vehicles that are 80,000 miles or less. While conducting research I noticed that this is a common problem in the GMC Sierra 1500 to the point there is a lawsuit against GMC right now. I am frustrated because I believe that there should be a recall as the safety of my kids and I were put in danger for a part that is commonly failing in this vehicle.

POWER TRAIN

Transmission started fluttering around 60k miles. Per GMC Dealer - this is due to water getting into transmission from fluid put in at the factory. Even though dealer admitted that it's a defect from the factory, the warranty wouldn't cover the repair. This is a well known issue in the 5.3L 8 speed trans.

ENGINE

Engine keeps running out of oil I’ve taken it several times to the dealership sometimes there was no oil in it. Only has 80,000 miles problem started 2 years having it

POWER TRAIN

The contact owns a 2019 GMC Sierra 1500. The contact stated while driving at approximately 20 MPH and making a left turn, the vehicle shook violently. The contact stated that no warning light was illuminated. The contact stopped the vehicle and turned off, and restarted the vehicle. The vehicle was restarted, but after shifting into drive(D), and depressing the accelerator pedal, the vehicle failed to exceed 30 MPH. The contact stated that the vehicle was making an abnormal "roaring" sound. The contact stopped the vehicle and had the vehicle to be towed to the dealer. The dealer diagnosed the vehicle and determined that the valve body on the transmission needed to be replaced; however, the part to complete the repair was on a national back order. The vehicle was not repaired. The manufacturer was informed of the failure. The contact stated that the failure was the second transmission failure. The contact had the transmission replaced in 2024 by the same dealer. The failure mileage was approximately 84,000.

ENGINE

The truck had been parked for about 4 hours, after a 250 mile trip. I cranked it and started driving to return home. I heard an intermittent squealing noise while driving. I had driven only about 2 miles when the engine suddenly shut down in heavy traffic on a four lane divided highway. I managed to get the truck into the median and stop. I was left stranded in the middle of the highway. It turns out the the engine bearing went bad and ruined the engine. I will now have to replace the engine at a cost of about $15,000.00. This is a safety concern when the engine suddenly failed and stalled while driving on a four lane divided highway, in heavy traffic.

ENGINE

ENGINE FAILURE. CAM BEARINGS FAILURE. ENGINE SEIZED UP. SAFETY ISSUE: TRAVELING ON HIGHWAY TOWING A FISHING BOAT. PULLED OFF FOR FUEL. ENGINE COMPLETELY SEIZED UP WHILE AT GAS PUMP. IF IT HAD IT SEIZED UP BEFORE PULLING OFF HIGHWAY FOR GAS, GREAT RISK FOR A CATASTROPHIC CRASH, ESPECIALLY WHEN PULLING A BOAT TRAILER. ALL SYSTEMS INCLUDING STEERING SHUT DOWN. JOHN JONES CHEVROLET DEALERSHIP IN SCOTTSBURG INDIANA RAN DIAGNOSTICS AND CONFIRMED COMPLETE ENGINE FAILURE. FAULTY CAM BEARINGS SEIZED UP. ENGINE IS RUINED AND MUST BE REPLACED. INSPECTION BY JOHN JONES CHEVROLET DEALERSHIP. WE HAD BEEN ON THE HIGHWAY FOR 3.5 HOURS WHEN PULLED OFF FOR GAS. THERE WERE NO WARNING SIGNS. NO CHECK ENGINE LIGHTS, NO LIGHTS AT ALL ON THE DASH. NO UNUSUAL SOUNDS OR SMOKE. NOTHING UNUSUAL BEFORE THE ENGINE SEIZED UP.

POWER TRAIN

valve train/camshaft fairlure which damaged entire engine - happened at 99,650 miles

ENGINE

valve train/camshaft fairlure which damaged entire engine - happened at 99,650 miles

ENGINE

The passenger side lifters in my truck failed while at idle/5mph speed causing catastrophic engine failure. 2019 6.2L V8 from GM. From my own independent research, and the research/survey of others online, this appears to be a very common problem as a result of known defective parts that were installed on GM engines.

POWER TRAIN

Lifters in engine failed at beginning of March 2025 and destroyed inside of engine. Transmission failed in summer of 2024 and had to be replaced

ELECTRICAL SYSTEM

Lifters in engine failed at beginning of March 2025 and destroyed inside of engine. Transmission failed in summer of 2024 and had to be replaced

ENGINE

Lifters in engine failed at beginning of March 2025 and destroyed inside of engine. Transmission failed in summer of 2024 and had to be replaced

ENGINE

I was driving down [XXX] near Harrisburg PA in an active construction zone when the truck shut off, the dash blinked a few things very rapidly then went black. I was barely able to coast to an area large enough to get my truck out of the highway traffic. I was stranded on the side of the highway for 4 hrs and due to the construction hardly able to get out of the truck safely as it was around a bend. I’ve had to have the truck towed to a few mechanics to learn that it has suffered a catastrophic engine failure as all cylinders have lost compression. It made no noise at all. There was no signs this was going to happen, just driving normally then a complete engine failure resulting in no compression in all 8 cylinders with no noise. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

POWER TRAIN

While attempting to accelerate to get onto the expressway with no warning, the vehicle went into limp mode. Traction control, front end warning collision, auto/stop start functionality was all disabled and the engine light warning light on came on. The vehicle locked out and reduced acceleration. An attempt to pull over and turn the vehicle off for a few seconds was made. Once restarted, the vehicle continued running on limp mode at reduced speeds with the same indicators mentioned still disabled and locked out.

ENGINE

While attempting to accelerate to get onto the expressway with no warning, the vehicle went into limp mode. Traction control, front end warning collision, auto/stop start functionality was all disabled and the engine light warning light on came on. The vehicle locked out and reduced acceleration. An attempt to pull over and turn the vehicle off for a few seconds was made. Once restarted, the vehicle continued running on limp mode at reduced speeds with the same indicators mentioned still disabled and locked out.

ELECTRICAL SYSTEM

While attempting to accelerate to get onto the expressway with no warning, the vehicle went into limp mode. Traction control, front end warning collision, auto/stop start functionality was all disabled and the engine light warning light on came on. The vehicle locked out and reduced acceleration. An attempt to pull over and turn the vehicle off for a few seconds was made. Once restarted, the vehicle continued running on limp mode at reduced speeds with the same indicators mentioned still disabled and locked out.

ENGINE

It blew a hole through the engine block. The engine is a 6.2 L 87

UNKNOWN OR OTHER

Cylinder 5 failure and cam shaft miles 78k. Have to replace full top end or brand new motor cost $10k up to $13k to fix at dealer

FUEL/PROPULSION SYSTEM

Cylinder 5 failure and cam shaft miles 78k. Have to replace full top end or brand new motor cost $10k up to $13k to fix at dealer

ENGINE

Cylinder 5 failure and cam shaft miles 78k. Have to replace full top end or brand new motor cost $10k up to $13k to fix at dealer

SERVICE BRAKES

I was traveling north on interstate 95 and approaching my exit ramp. I was initially in the inside lane of travel. I accelerated to merge into the outside lane, between two other vehicles, and then onto the exit ramp. Once on the exit ramp, I let off of the throttle and the engine suddenly shut down. I noticed a message on driver information center instructing me to shift the vehicle into neutral and press "start again". The engine had shut down without any warning whatsoever. I complied with the instructions to no avail. The truck is over half full of fuel. I was within an hour of home after completing an approximately 8 hour, 500 mile, round trip over 2 days of driving. After this event, I connected an OBD2 scanner and the only code found was P25A2 brake system control module. I placed the truck in park and tried repeatedly to start the engine. It would not turn over, crank or start. I had power to all systems and no other codes. I had to have the truck towed from the scene. The truck's performance had previously been flawless during this entire trip and had given me no warning whatsoever of the sudden engine shutdown. This is extremely dangerous and a safety concern.

ENGINE

I was traveling north on interstate 95 and approaching my exit ramp. I was initially in the inside lane of travel. I accelerated to merge into the outside lane, between two other vehicles, and then onto the exit ramp. Once on the exit ramp, I let off of the throttle and the engine suddenly shut down. I noticed a message on driver information center instructing me to shift the vehicle into neutral and press "start again". The engine had shut down without any warning whatsoever. I complied with the instructions to no avail. The truck is over half full of fuel. I was within an hour of home after completing an approximately 8 hour, 500 mile, round trip over 2 days of driving. After this event, I connected an OBD2 scanner and the only code found was P25A2 brake system control module. I placed the truck in park and tried repeatedly to start the engine. It would not turn over, crank or start. I had power to all systems and no other codes. I had to have the truck towed from the scene. The truck's performance had previously been flawless during this entire trip and had given me no warning whatsoever of the sudden engine shutdown. This is extremely dangerous and a safety concern.

POWER TRAIN

Bad torque converter with 56000 miles and a month out of warranty and GM says to bad.

ENGINE

Driving on the highway, while accelerating, heard a mechanical failure from the front end of the vehicle and had immediate loss of power, and reduction in performance/handling. The engine light came on and three warning messages; Service ESC, Service Parking Brake & Steering Assist is Reduced Drive with Care. Fortunately, the local GMC dealer was the next exit which is where the truck is currently located. The truck was inspected by the dealer and determined the engine should be replaced. It is available for inspection upon request. I have pictures of the warning messages and the work order from the dealer of their findings to date.

STEERING

While driving at low speed the power assisted steering quit working. I could steer but with great effort. Drove two blocks home. Shut it off and restarted. Everything was fine after restarting. I’m afraid to drive the vehicle after this experience.

SERVICE BRAKES

Vehicle was having trouble accelerating, like the parking brake was on. Then received a message that the brake system failed, lane assist failed, and I couldn’t drive faster than 43 mph. Then a message about the trailer brake appeared

POWER TRAIN

accelerating from a stop, 1st and 2nd gear hard shifts. gm previously changed program and type of fluid. said this was normal

SERVICE BRAKES

The contact owns a 2019 GMC Sierra 1500. The contact stated while driving approximately 20 MPH, the vehicle came to a screeching stop. There were no warning lights illuminated. The vehicle was towed to the local dealer, where it was diagnosed that the electronic brake control module had short-circuited and there was a miscommunication, which engaged the parking brake and locked up the rear wheels. The vehicle was not repaired. The vehicle was previously taken to the same dealer on two occasions and repaired under NHTSA Campaign Number: 19V889000 (SERVICE BRAKES, HYDRAULIC, SERVICE BRAKES, ELECTRONIC STABILITY CONTROL (ESC); however, the failure recurred. The manufacturer was contacted and opened a case, but no additional assistance was provided. The failure mileage was approximately 7,000.

ELECTRONIC STABILITY CONTROL (ESC)

The contact owns a 2019 GMC Sierra 1500. The contact stated while driving approximately 20 MPH, the vehicle came to a screeching stop. There were no warning lights illuminated. The vehicle was towed to the local dealer, where it was diagnosed that the electronic brake control module had short-circuited and there was a miscommunication, which engaged the parking brake and locked up the rear wheels. The vehicle was not repaired. The vehicle was previously taken to the same dealer on two occasions and repaired under NHTSA Campaign Number: 19V889000 (SERVICE BRAKES, HYDRAULIC, SERVICE BRAKES, ELECTRONIC STABILITY CONTROL (ESC); however, the failure recurred. The manufacturer was contacted and opened a case, but no additional assistance was provided. The failure mileage was approximately 7,000.

SERVICE BRAKES, HYDRAULIC

The contact owns a 2019 GMC Sierra 1500. The contact stated while driving approximately 20 MPH, the vehicle came to a screeching stop. There were no warning lights illuminated. The vehicle was towed to the local dealer, where it was diagnosed that the electronic brake control module had short-circuited and there was a miscommunication, which engaged the parking brake and locked up the rear wheels. The vehicle was not repaired. The vehicle was previously taken to the same dealer on two occasions and repaired under NHTSA Campaign Number: 19V889000 (SERVICE BRAKES, HYDRAULIC, SERVICE BRAKES, ELECTRONIC STABILITY CONTROL (ESC); however, the failure recurred. The manufacturer was contacted and opened a case, but no additional assistance was provided. The failure mileage was approximately 7,000.

ELECTRICAL SYSTEM

While driving at 65 mph on a freeway, the engine failed and cracked a rod with fresh oil and all maintenance done regularly. Truck brakes would not work after engine failure. Truck was fully disabled and I was stranded on freeway @ 90,000 miles. Lights on exterior of the vehicle were dim after engine failed

ENGINE

While driving at 65 mph on a freeway, the engine failed and cracked a rod with fresh oil and all maintenance done regularly. Truck brakes would not work after engine failure. Truck was fully disabled and I was stranded on freeway @ 90,000 miles. Lights on exterior of the vehicle were dim after engine failed

ENGINE

This morning, while driving to work, my truck was operating smoothly without any prior warning signs. Suddenly, the dashboard displayed a message indicating "Low Oil Pressure" and instructed me to turn off the vehicle. There were no preceding alerts, such as check engine lights or low oil pressure indicators. As I was preparing to follow the instructions, the vehicle dashboard displayed another message directing me to put the truck in neutral, and then the engine automatically shut off. Unfortunately, after this occurred, I was unable to restart the truck.

POWER TRAIN

The transmission failed and GM will not provide parts to repair the truck. Only has 57000 miles

POWER TRAIN

My transmission keeps on jerking all the time when we are driving

ENGINE

I was driving to work on Saturday morning [XXX]. As I pulled out of the stop sign and approached 45 mph the engine stop. Making me a hazard within the road. I had to abruptly pull off into a road/yard in order to be safe. All while not having a power as the engine completely stopped. Upon investigation the dealership, Budd Baer in Washington Pennsylvania confirmed the engine had seized up due an issue in rotating assembly. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING

On a normal trip to work the dash light lit up then gave me these warnings. Service ESC, Service Trailer brake, Brake system Failure-62 mph top speed, steering assist reduced. Dashboard lights that were on, ABS Check Engine, Brake, Traction Control. When I tried to slow down the power assist was gone on the brakes, I had a little braking when I pushed the pedal all the way to the floor as hard as i could, when I went to turn the wheel was hard to turn. I have had no issues like this before. After I managed to stop and turn off then on the vehicle everything came back expect for a warning to service the trailer brakes and the check engine light was still on. It all cleared after a few more restarts. I got the truck to the dealer 4 days later and they said it was the battery going bad even though I was not having any problem starting the vehicle, I had them replace the battery. I am unsure if the problem is resolved, time will tell. What I am sure of is if my daughter had been driving the truck, she would not have had the strength to get the brakes to work or turn the wheel, she would have had a accident for sure.

STEERING

On a normal trip to work the dash light lit up then gave me these warnings. Service ESC, Service Trailer brake, Brake system Failure-62 mph top speed, steering assist reduced. Dashboard lights that were on, ABS Check Engine, Brake, Traction Control. When I tried to slow down the power assist was gone on the brakes, I had a little braking when I pushed the pedal all the way to the floor as hard as i could, when I went to turn the wheel was hard to turn. I have had no issues like this before. After I managed to stop and turn off then on the vehicle everything came back expect for a warning to service the trailer brakes and the check engine light was still on. It all cleared after a few more restarts. I got the truck to the dealer 4 days later and they said it was the battery going bad even though I was not having any problem starting the vehicle, I had them replace the battery. I am unsure if the problem is resolved, time will tell. What I am sure of is if my daughter had been driving the truck, she would not have had the strength to get the brakes to work or turn the wheel, she would have had a accident for sure.

SERVICE BRAKES

On a normal trip to work the dash light lit up then gave me these warnings. Service ESC, Service Trailer brake, Brake system Failure-62 mph top speed, steering assist reduced. Dashboard lights that were on, ABS Check Engine, Brake, Traction Control. When I tried to slow down the power assist was gone on the brakes, I had a little braking when I pushed the pedal all the way to the floor as hard as i could, when I went to turn the wheel was hard to turn. I have had no issues like this before. After I managed to stop and turn off then on the vehicle everything came back expect for a warning to service the trailer brakes and the check engine light was still on. It all cleared after a few more restarts. I got the truck to the dealer 4 days later and they said it was the battery going bad even though I was not having any problem starting the vehicle, I had them replace the battery. I am unsure if the problem is resolved, time will tell. What I am sure of is if my daughter had been driving the truck, she would not have had the strength to get the brakes to work or turn the wheel, she would have had a accident for sure.

ENGINE

Engine failure. Lifters failed causing internal engine damage. No previous warning. 160000 miles. Repair cost is $5000

POWER TRAIN

Took truck to dealership for transmission issues such as hard shifts and shuttering on highway. Waiting 2 months for parts that didn’t fix the issue. Now waiting on another transmission which I’m being told is on back order!

ENGINE

cylinder #1 had misfire and this was because the liftt malfunctioned which inturn caused it to grind on camshaft

ENGINE

Engine threw a rod and needed to be replaced out of pocket due to vehicle being out of warranty. Going down I35 so not safe at all. All dash light illuminated when it occurred.

ENGINE

Lifters are failing which could cause motor shutdown during driving.11/26/2024

POWER TRAIN

Unknown mostly. Water pump ended up cracking while running. Power failure notice had come up on dash and then vehicle shut off while running. Dealership made repairs but unable to identify root cause.

ENGINE

Unknown mostly. Water pump ended up cracking while running. Power failure notice had come up on dash and then vehicle shut off while running. Dealership made repairs but unable to identify root cause.

ENGINE

while driving down the road i noticed the truck had a lack of power and then the check engine light came on and as soon as it came on i heard a ticking/clacking noise. I got the truck towed to a repair facility and they found misfire on cylinder 8, they informed me and wanted to drain the oil and also removed the valve cover in order to check the valve train. They found a lot of metal in the oil along with a decent amount of decent shavings in the oil filter. They removed the valve cover and found a bent pushrod and stuck lifter. They did mention a possible noise coming from the bottom end of the engine (knocking) but at this time with the amount of contaminates in the oil and stuck lifter, The engine is recommended to be replaced. No ETA at this time for a replacement

ENGINE

Engine seized it won’t crank we swapped the alternator 2 times the battery once the and the starter once we also swapped the battery chip 3 times and it would turn off out of no where. We thought it was because of the miles but it was working fine. And took care of it nicely. We took it to a dealership and they told us that it needed a new motor because it was seized. But before that it would start up and turn off after 15 minutes. We took it somewhere else in a tow truck and they told us that the engine was seized.

ENGINE

On Jan 7, 2024, we went to Walmart to shop (DeRidder, LA). The truck was running normal. All gauges were normal and the reason I can say this is because our truck broke down in 2023, so we have a habit of checking them when we start the truck before driving and during driving periodically. When leaving Walmart we were at the red light and the truck just stopped. A message came on and said to shift into Neutral, which we did. The truck then died and would not stop. Pushed it into the parking lot and had it towed to Billy Navarre Chevrolet, Lake Charles, LA. After they looked at the truck on Jan 9, they said the engine was seized and we needed a new one. They couldn't say why. They said that would be figured out when the old motor was shipped back. After putting in the new motor, the POC at the dealership called and said we needed a new water pump that the one he took off was bad. They insinuated that was the cause of the engine seizing. However this wasn't determined until they went to put the old one on. If the water pump failed, we believe it should have started showing engine overheat and there was no such thing.

FUEL/PROPULSION SYSTEM

Complete engine failure. Absolutely insane. All lights on dash, engine seized while driving!!!!!!!!!!!!!! Unbelievable that GMC keeps making us fix issues and pay for it! They won't cover the cost. This has been happening too much and putting my family at risk!

ENGINE

Complete engine failure. Absolutely insane. All lights on dash, engine seized while driving!!!!!!!!!!!!!! Unbelievable that GMC keeps making us fix issues and pay for it! They won't cover the cost. This has been happening too much and putting my family at risk!

ELECTRICAL SYSTEM

Complete engine failure. Absolutely insane. All lights on dash, engine seized while driving!!!!!!!!!!!!!! Unbelievable that GMC keeps making us fix issues and pay for it! They won't cover the cost. This has been happening too much and putting my family at risk!

POWER TRAIN

Transmission has had shifting, shudder and failure to go into gear from day 1 of owning the truck. Has been to the dealer on several occassions for the same issue just to be told that they either could not reproduce the issue or it was normal. On another occasion the dealer was able to notice some shudder and shifting issue and replaced the valve body under warranty. Now that the vehicle is out of warranty I’m being told the vehicle needs a complete transmission rebuild and torque converter at an out of pocket cost to me of $8500. I know of many others with the same issues from the onset of owning these vehicles.

ENGINE

Engine failure- sent in old engine as a core piston broke off the rod causing the engine to seize replacing with reman engine from GM

ENGINE

Driving home on a rural two-lane road the engine started make a load banging noise on the drivers side, than it started to skip and not running on eight cylinders. it than lost oil pressure.

ENGINE

I was driving down the highway with my teen daughter heading to a hockey tournament in Michigan. We live in Illinois. While in Michigan on the highway driving around 80 mph, I went to pass a vehicle and several service warning lights starting flashing on the dashboard. The ones that flashed were: Service ESC, Service Parking Break, Steering Assist is Reduced Drive with Care. At the time, the engine started making rattling noises and sounded rough. I could feel there was a problem right away. I carefully pulled over and turned the truck off. I waited a few minutes and then turned the truck back on. The service warning lights were still on and the engine was still running and sounding rough. I tried turning it off and on again but the same problem persisted. I then drove the truck about one mile to the next exit just to get off the highway. I was doing about 45mph during this time. I then pulled into a parking lot and contacted On Star to diagnosis the vehicle. They diagnosed a P300 code and said it was an engine misfire. I then found a local repair show and drove another 2 miles to get there. They looked at it for an hour and said they could not help me. They were also getting the cylinder misfire code. I had the vehicle towed to a dealership that same day. I had to rent a car to return back to Illinois with my daughter. After a week and a half, the dealer started looking into the issue. They diagnosed a lifter failure and said a new engine was needed. We purchased the new engine for $10,490 and the dealer installed it. Three weeks later, the vehicle was ready and we had to drive to Michigan to pick it up. I’ve reached out to GM and they just apologized and offered us 15,000 points in our GM account. We declined. We asked for financial assistance and they also declined and said it was out of warranty and it’s our responsibility to pay for all costs.

ENGINE

The contact owns a 2019 GMC Sierra 1500. The contact stated that while driving approximately 25 MPH, there was a ticking sound coming from the engine compartment. The contact pulled over to the side of the road where the engine seized. There were no warning lights illuminated. The vehicle was towed to the dealer who diagnosed that the engine had seized and needed to be repaired. The engine was rebuilt. The manufacturer was made aware of the failure. The failure mileage was 114,660.

EXTERIOR LIGHTING:BRAKE LIGHTS

The contact owned a 2019 GMC Sierra 1500. The contact stated that while driving 25 MPH, there was an abnormal sound coming from the rear of the vehicle before the vehicle jerked forward. There was no warning light illuminated. The contact was able to pull over on the side of the road. The contact also stated that the radio would turn on, but there was no image on the screen. The contact took the vehicle to the dealer; however, no cause for the failure was found. The vehicle was not diagnosed nor repaired. The manufacturer was made aware of the failure and informed the contact that the vehicle was no longer covered under an undisclosed Customer Satisfaction Program. The contact stated that the abnormal sounds and failure persisted, and the manufacturer was contacted again. The vehicle was taken to the dealer and was diagnosed with a misfire and that the brake lights needed to be replaced. The vehicle was not repaired. The failure mileage was approximately 42,000.

ELECTRICAL SYSTEM

The contact owned a 2019 GMC Sierra 1500. The contact stated that while driving 25 MPH, there was an abnormal sound coming from the rear of the vehicle before the vehicle jerked forward. There was no warning light illuminated. The contact was able to pull over on the side of the road. The contact also stated that the radio would turn on, but there was no image on the screen. The contact took the vehicle to the dealer; however, no cause for the failure was found. The vehicle was not diagnosed nor repaired. The manufacturer was made aware of the failure and informed the contact that the vehicle was no longer covered under an undisclosed Customer Satisfaction Program. The contact stated that the abnormal sounds and failure persisted, and the manufacturer was contacted again. The vehicle was taken to the dealer and was diagnosed with a misfire and that the brake lights needed to be replaced. The vehicle was not repaired. The failure mileage was approximately 42,000.

ENGINE

The contact owned a 2019 GMC Sierra 1500. The contact stated that while driving 25 MPH, there was an abnormal sound coming from the rear of the vehicle before the vehicle jerked forward. There was no warning light illuminated. The contact was able to pull over on the side of the road. The contact also stated that the radio would turn on, but there was no image on the screen. The contact took the vehicle to the dealer; however, no cause for the failure was found. The vehicle was not diagnosed nor repaired. The manufacturer was made aware of the failure and informed the contact that the vehicle was no longer covered under an undisclosed Customer Satisfaction Program. The contact stated that the abnormal sounds and failure persisted, and the manufacturer was contacted again. The vehicle was taken to the dealer and was diagnosed with a misfire and that the brake lights needed to be replaced. The vehicle was not repaired. The failure mileage was approximately 42,000.

POWER TRAIN

The transmission is experiences periodic rough shifting, a shudder and droning noise between 1,000 and 1,500 RPM. An independent transmission specialty shop states the transmission is starting to fail. The transmission, differentials and transfer case fluids were changed at 53,000 miles and again at 104,000 miles.

ENGINE

The truck engine experienced catastrophic failure while driving at 30 MPH. There was no warning or dashboard indication problem prior to the failure. Loud ticking noises were coming from the engine compartment just before full power loss while driving. The vehicle was towed to an independent mechanic. The mechanics found bent valves, damaged pistons and connecting rods. The mechanic replaced the the engine with a GM Longblock. The cost of this repair was just over $10,000.

ENGINE

Engine has a bearing failure. Just purchased the truck it started to tick so I was being proactive stopped driving the the truck to prevent lock up.

ENGINE

While driving the vehicle, had a sudden “thud” from the engine compartment and immediately started getting error messages on the dashboard. When the codes were pulled, it said a misfire from cylinder number 8. The initial shop it was taken to was unable to diagnose the problem and referred me to the dealership. Upon inspection at the dealership, they stated that the camshaft and all the lifters needed to be replaced. The vehicle is still at the dealership waiting for this to be done. Upon doing some research, I have found that lifter issues are a very common occurrence in these vehicles. I was reading this morning about the investigation that the NHTSA has started into issues with the L87 engine, which my vehicle has. If the investigation is concentrated on another issue, I would recommend that the lifter issue gets looked into as well. There is no reason that a vehicle with just over 100,000 miles and has had all the oil changes done on time, should suffer a failure like this that costs thousands so dollars to fix. I apologize for not including videos of the issue, I can’t save the ones that the dealership took. Please feel free to contact me if you need any further information or if I can be of further assistance. Thank you.

ENGINE

So August 29, 2023, at 46,000 miles, my engine failed completely with no warning or anything, while driving to work, was at the dealership until October 4th. Then December 10th, 2024 with 83,000 miles my engine failed again while my little brother and I were driving home late that night, on the highway at 70mph , suddenly losing power, causing us to be stranded on the side of the highway at 2am. Has been at the dealership since December 11th, with no eta in sight, and we're at 36 days and counting. A spac case was opened to escalate getting a part. This truck has been a problem and I want to get rid of it as its a safety hazard to myself, family members, and other on the road. GM customer service has also been giving me a runaround as well.

ENGINE

My 2019 GMC Sierra AT4 - Driving home from work on the highway car lost sudden power, All engine notifications appeared on dash and a very loud screeching sound happened. Was able to pull it onto the side of the road barely. Diagnosis from nearby shop was a lifter failure in cylinder 5 causing metal shavings to lock crank up. Total engine replacement. Car has 122,000 miles and every oil change done at 3,000 miles by GMC service technician since new and documented. GMC offered nothing when notified about the issue.

ENGINE

Engine failure with no prior warning 11/21/2023. We were on the highway. Truck made some noises and hesitated and stalled within 2 minutes. Thankfully, there was an off ramp and we were able to roll into a gas station. Had it towed to a GMC dealer. GMC dealer confirmed engine was blown. Dealer confirmed it's a known issue.

POWER TRAIN

The contact owns a 2019 GMC Sierra 1500. The contact stated while driving at approximately 25 MPH, an abnormal sound was coming from under the floorboards. No warning light was illuminated. The contact had taken the vehicle to a local dealer, where it was diagnosed and determined that the transmission oil pump had failed and the transmission needed to be replaced. The vehicle was not repaired. The manufacturer was informed of the failure. The failure mileage was approximately 158,000.

POWER TRAIN

My truck has had two lifters fail at different times which ended up ruining the camshaft Now my truck feels like it’s going over a rumble strip on the highway at low rpm’s. During this speed the trans is slipping and can not pick a gear. Other gmcs had a service bulletine to change trans fluid but my did not. I have emailed twice to gm and have not heard anything back. I have close to 10000 in repairs and my truck has been down for 4 months.

BACK OVER PREVENTION

The contact owns a 2019 GMC Sierra 1500. The contact stated that while the vehicle was parked, the contact became aware that the rearview camera was inoperable. The contact stated that the image on the screen was blank. The vehicle was taken to the dealer where it was diagnosed and determined that the rearview camera module had failed and needed to be replaced. The vehicle was not repaired. The manufacturer was not made aware of the failure. The approximate failure mileage was 56,000.