ISUZU NPR HD

SUSPENSION:REAR:SPRINGS:LEAF SPRING ASSEMBLY:U-BOLT, LEAF SPRING TO AXLE

Isuzu Technical Center of America, Inc. (Isuzu) is recalling certain 2015-2017 Isuzu NPR, Reach, 2016-2020 Isuzu NPR XD, NPR HD, NQR, 2016-2021 Isuzu NRR, 2017-2020 Chevrolet 4500XD, 4500HD, 5500HD, and 2020 Chevrolet 5500XD vehicles. The U-bolt nuts for the rear axle may not have been properly tightened and may loosen, causing the axle to misalign.

Risk: The misalignment may cause the propeller shaft to separate, causing a loss of power to the rear wheels and a stall, increasing the risk of a crash.

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

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.

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.

SEAT BELTS:FRONT:WEBBING

Isuzu Technical Center of America, Inc. (Isuzu) is recalling certain 2020 Isuzu NPR HD, NPR XD, NQR and NRR and Chevrolet 4500HD, 4500XD, 5500HD and 5500XD and 2019 Isuzu NPR HD GAS, NPR GAS and Chevrolet 4500 and Chevrolet 3500 vehicles equipped with a dual mode belt locking mechanism seat belt assembly. Due to a manufacturing issue, the seat belt webbing locking mechanism may not properly restrain the occupant as intended.

Risk: In the event of a crash, if the occupant is not properly restrained, there is an increased risk of injury.

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.

WHEELS:LUGS/NUTS/BOLTS/STUDS

Isuzu Technical Center of America, Inc. (Isuzu) is recalling certain 2017-2020 NPR-HD, 2019-2020 NPR-XD, NQR, NRR, Chevrolet 4500HD, Chevrolet 5500HD and Chevrolet 5500XD, and 2020 Chevrolet 4500XD vehicles. The lug nuts on the rear outer wheels may not have been properly tightened when installed onto the rear axles.

Risk: If the lug nuts were not properly tightened, they can loosen, causing the to wheel separate from the vehicle, increasing the risk of a crash.

EXTERIOR LIGHTING:BRAKE LIGHTS:SWITCH

Isuzu Technical Center of America, Inc. (Isuzu) is recalling certain 2018 Isuzu NPR and 2019 Isuzu NPR-HD and NPR-XD vehicles. These vehicles have a brake switch and nylon retainer that may not have been properly secured into the steel brake pedal assembly bracket.

Risk: If the brake switch and nylon retainer are not properly secured, the switch can detach from the bracket causing the brake lights to illuminate whether or not brake pedal is depressed, the shift interlock will not operate and the accelerator pedal input will be disabled resulting in the inability to accelerate. These conditions can increase the risk of a crash.

POWER TRAIN:AXLE HUBS

Isuzu Technical Center of America, Inc. (Isuzu) is recalling certain 2011-2016 NPR, 2011-2017 NPR-HD, NQR, NRR, 2015-2017 NPR-XD, 2012-2016 Reach, NPR Gas and NPR-HD Gas incomplete trucks. The left rear wheel bearing hub locking bolts may not have been properly tightened during assembly.

Risk: The loose bolts can allow the wheel assembly to move outward from the axle housing, affecting the control of the vehicle and reducing braking performance, thereby increasing a risk of a crash.

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.