2025 BUICK ENCLAVE

FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL

Super Cruise system malfunctioned and is available for inspection. The vehicle came close to colliding with a guardrail as explained below. Since I believe the issue is not with the vehicle itself, but with Road Information used by Super Cruise, I have reported this to GM Customer Service but not to a dealer. Monday August 25, 2025 Canada – Nova Scotia and New Brunswick While driving on Super Cruise (SC) at 75 MPH in the right lane of a 4 lane freeway (2 lanes each direction), three times the vehicle attempted to enter a non-existent right lane, driving onto the right shoulder and heading for a guardrail. In each case SC warned me of the lane change with normal alerts of seat vibration, right turn signal activation and the DIC display showing an image of a right lane, in green, indicating the lane was safe to enter. However, in each case there was only a partial lane or no lane at time the vehicle crossed the white line. I was alert, and surprised of its action which I did not initiate; and before taking control I waited about 3 seconds to see if SC would stop the maneuver and return to the proper lane. But in each case the vehicle entered the shoulder and appeared to continue, getting close to a guardrail. •The 1st incident occurred on Nova Scotia Hwy 104 at exit 29 where the vehicle attempted to enter the entrance lane at the point where it ended, at 9 AM ADT. •The 2nd incident occurred on New Brunswick Hwy 2 at exit 211 where the vehicle attempted to enter the entrance lane at the point where it ended, at 12 PM ADT. •The 3rd incident occurred again on New Brunswick Hwy 2, at exit175 where the vehicle attempted to enter the exit lane at the point where it ended at, 12:30PM ADT. Weather was sunny and dry with good visibility. Traffic was extremely light. I have since driven on SC approximately 400 miles without incident. And since most of my driving is on freeways, I have probably driven on Super Cruise for over 4,000 miles without incident.

LANE DEPARTURE: ASSIST

On 7/20/2025 the following warnings were displayed: Brake System Warning Light (BRAKE), ABS Warning Light, Lane keep Assist Light is white, Automatic Emergency Braking Disabled light stayed on, Traction Control system (TCS) electronic stability control light stays on. Messages: Auto Hold Unavailable, Service Brake Assist, Service ESC, Service Stability Control: Your vehicle may be hard to control in certain driving conditions, schedule service soon. On page 103 in the owner's manual the warning for the Brake system warning light said Driving with the warning light on can lead to a crash. Have the vehicle towed for service. I had it towed to a local GMC /Buick service department. My safety and the safety of others were put at risk if the car did not brake. Could have led to a crash. The problem has been confirmed by the dealer. They indicated the Brake Master Cylinder needs to be replaced. ( 7/28/2025 I was told it was on back order, when available is unknown) Warning lamps etc have been described above. I had just pulled into the driveway of a friend and got all the warning lights.

FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING

On 7/20/2025 the following warnings were displayed: Brake System Warning Light (BRAKE), ABS Warning Light, Lane keep Assist Light is white, Automatic Emergency Braking Disabled light stayed on, Traction Control system (TCS) electronic stability control light stays on. Messages: Auto Hold Unavailable, Service Brake Assist, Service ESC, Service Stability Control: Your vehicle may be hard to control in certain driving conditions, schedule service soon. On page 103 in the owner's manual the warning for the Brake system warning light said Driving with the warning light on can lead to a crash. Have the vehicle towed for service. I had it towed to a local GMC /Buick service department. My safety and the safety of others were put at risk if the car did not brake. Could have led to a crash. The problem has been confirmed by the dealer. They indicated the Brake Master Cylinder needs to be replaced. ( 7/28/2025 I was told it was on back order, when available is unknown) Warning lamps etc have been described above. I had just pulled into the driveway of a friend and got all the warning lights.

UNKNOWN OR OTHER

On 7/20/2025 the following warnings were displayed: Brake System Warning Light (BRAKE), ABS Warning Light, Lane keep Assist Light is white, Automatic Emergency Braking Disabled light stayed on, Traction Control system (TCS) electronic stability control light stays on. Messages: Auto Hold Unavailable, Service Brake Assist, Service ESC, Service Stability Control: Your vehicle may be hard to control in certain driving conditions, schedule service soon. On page 103 in the owner's manual the warning for the Brake system warning light said Driving with the warning light on can lead to a crash. Have the vehicle towed for service. I had it towed to a local GMC /Buick service department. My safety and the safety of others were put at risk if the car did not brake. Could have led to a crash. The problem has been confirmed by the dealer. They indicated the Brake Master Cylinder needs to be replaced. ( 7/28/2025 I was told it was on back order, when available is unknown) Warning lamps etc have been described above. I had just pulled into the driveway of a friend and got all the warning lights.

SERVICE BRAKES, HYDRAULIC

The contact owns a 2025 Buick Enclave. The contact stated that upon starting the vehicle, several unknown warning lights illuminated. The vehicle was taken to the dealer, who determined that a software update was required. The vehicle was repaired, but the failure reoccurred. The vehicle was taken back to the dealer, who diagnosed a failure with the brake master cylinder. The vehicle was not repaired due to parts being on backorder. After investigating the failure, the contact related the failure to Service Update: N242482170. The manufacturer was notified of the failure, a case was opened, and the contact was referred to the NHTSA Hotline for assistance. The failure mileage was 650.

FUEL/PROPULSION SYSTEM

as someone who has been in the car business his entire life, the below TSB is utter bullshit. My 2025 enclave with 3400 miles on it had a catastrophic and copious amount of transmission fluid. on my tile floor in my garage and all over my driveway a minimum of 5 to 7 quarts.. had my wife been driving the car with my grandchildren as a guarantee it would’ve locked the transmission up and evacuated all the oil as it is on the high-pressure side of the pump. Based on my knowledge of recalls, this should be a stop sale and a recall, not a TSB why have they been given a pass on this? https://static.nhtsa.gov/odi/tsbs/2025/MC-11014291-0001.pdf

UNKNOWN OR OTHER

There is no manual door unlock for the driver or front passenger. I’ve contacted Buick and the dealership and they have verified in the event of an electrical failure or fire there is no way to unlock the front doors to exit the vehicle.

UNKNOWN OR OTHER

I was driving on the interstate and the car just shut off. I was on the left lane and cars were honking and tailing me as I was trying to get off. I could not get off on the left and had to drift across to the right side. Thank God it was downhill. I drifted to the exit and went off onto the grass. My safety was at risk to the fullest. I am very lucky I was not killed as well as my sister! It was the most frightening experience. The car was towed to Pensacola Step one dealership. The manager of service says it needs a new engine. The car is only 6 months old! No warnings until it shut off, the gas peddle didn't work and I don't remember what it said I was a wreck.

UNKNOWN OR OTHER

We experienced a spontaneous sunroof explosion. Vehicle was towed to the dealership. Sunroof is being replaced under warrenty. The vehicle is presently stored underroof at Barkley GMC, Tuscaloosa, AL. After the very loud explosion, I pulled to the side of the road and engaged On-Star for a wrecker. There were no warning lights... just a spontaneous explosion ... blew out the entire sunroof.

ELECTRICAL SYSTEM

Check engine light came on first and then the infotainment went blank for three days. Took to dealership for the software update which shut the infotainment system down completely.