Isuzu Technical Center of America, Inc. (Isuzu) is recalling certain 2020 Isuzu NPR-HD Gas (Crew Cab) and 2020 Chevrolet 4500 (Crew Cab) trucks equipped with 6.6L gasoline engines. The positive cable connecting the battery to the starter may be too long and may have been routed too close to the right-side exhaust pipe.

Risk: Over time, heat from the exhaust pipe may cause the conduit and insulation to deteriorate, exposing the wires, possibly causing a short circuit which could result in a no-start condition or a fire.

2020 CHEVROLET LOW CAB FORWARD 4500

46 vehicles affected

20V721000

ENGINE AND ENGINE COOLING:COOLING SYSTEM:HOSES/LINES/PIPING/FITTINGS

Isuzu Technical Center of America, Inc. (Isuzu) is recalling certain 2020 NPR-HD (Crew Cab) and Chevrolet 4500 (Crew Cab) vehicles equipped with 6.6L gasoline engines. The chassis harness and the coolant return hose from the radiator to the reservoir (surge hose) may chafe. Continued chafing could cause wear in the harness and/or hose, ultimately causing a hole in the hose with the potential for engine coolant to leak and/or causing damage to the harness with the potential for a short circuit.

Risk: Leaking engine coolant and/or a damaged wire harness may result in a no-start condition, an engine stall, or an electrical short. These scenarios increase the risk of a crash or fire.

2019 CHEVROLET LOW CAB FORWARD 4500

264 vehicles affected

19V064000

ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL

Isuzu Technical Center of America, Inc. (Isuzu) is recalling certain 2019 Isuzu NPR-HD, NPR-XD, NQR, NRR, Chevrolet 4500HD, 4500XD, 5500HD, and 5500XD. The odometer accurately measures the distance traveled in miles, but erroneously indicates that they are kilometers in the LCD display instead of miles.

Risk: An incorrect odometer reading could lead to an unintended delay in critical safety related maintenance, potentially impairing the safe operation of the vehicle and increasing the risk of a crash.

2018 CHEVROLET LOW CAB FORWARD 4500

16766 vehicles affected

19V647000

ELECTRICAL SYSTEM:WIRING

Isuzu Technical Center of America, Inc. (Isuzu) is recalling certain 2017-2019 N-GAS HD and Chevrolet Low Cab Forward 3500 and 4500 vehicles and 2018-2019 Isuzu FTR and Chevrolet Low Cab Forward 6500XD vehicles. The power supply bolt in the relay box may not have been properly tightened during harness production at the supplier. This may lead to melting of the power wire and/or a loss of electrical power to the vehicle, which can lead to a stall.

Risk: A stall can increase the risk of a crash.

2016 CHEVROLET LOW CAB FORWARD 4500

69138 vehicles affected

17V726000

EQUIPMENT

Isuzu Technical Center of America, Inc. (Isuzu) is recalling certain 2011-2017 Isuzu NPR, 2008 NPR HD and NPR-HD Gas, 2011-2018 NPR HD and NRR, 2015-2018 NPR XD, 2012-2018 NQR, 2012-2017 NPR Gas and NPR-HD Gas, 2016-2017 Chevrolet Low Cab Forward 3500 HD, 3500 and 4500 and 2017-2018 Chevrolet Low Cab Forward 4500 HD, 4500 XD, 5500 HD and 5500 XD vehicles, equipped with certain Walter Kidde Plastic-Handle Fire Extinguishers, models FC10 and FC110. These extinguishers may become clogged, preventing the extinguisher from discharging as expected or excessive force may be needed to activate the extinguisher. Additionally, in certain models, the nozzle may detach from the valve assembly with enough force that it could cause injury and also render the product inoperable.

Risk: In the event of a fire, if the fire extinguisher does not function properly, it can increase the risk of injury.

2016 CHEVROLET LOW CAB FORWARD 4500

25018 vehicles affected

16V797000

VEHICLE SPEED CONTROL:ACCELERATOR PEDAL

Isuzu Technical Center of America, Inc. (Isuzu) is recalling certain model year 2014-2016 Isuzu NPR and NPR HD vehicles manufactured August 26, 2013, to November 11, 2016, and 2016 Chevrolet Low Cab Forward 3500 and 4500 vehicles manufactured July 27, 2016, to November 11, 2016. The affected vehicles have a throttle pedal that may get stuck under the steel stopper bolt, causing the pedal to remain in the full throttle position. Note: In gasoline models only.

Risk: A stuck open accelerator pedal may result in very high vehicle speeds and make it difficult to stop the vehicle, which could cause a crash, serious injury or death.

Recent Complaints

2024 CHEVROLET LOW CAB FORWARD 4500

ID: 2062417

STRUCTURE:BODY

The contact owns a 2024 Chevrolet Low Cab Forward 4500. The contact stated while the driver was driving approximately 60-65 MPH, the driver heard an abnormally loud sound coming from the mid-section of the vehicle. The driver pulled over to the side of the road and inspected the vehicle. The driver noticed that the bracket holding sliding ramp had detached and was resting on the driveshaft. The driver removed the bracket and the ramp assembly and was able to continue driving. The vehicle was driven to the office. The contact stated that other box trucks of the same year, make, and model owned by the company, had experienced the same failure. The dealer was contacted and referred the contact to the Box truck body manufacturer, Morgan Truck Body, who filed a case but denied assistance. The vehicle was not diagnosed or repaired. The failure mileage was 3,922.