4500HD

Belt Chirp Noise and-or Harmonic Balancer Rubbing on Timing Cover – 2019-2020 Chevrolet Silverado & GMC Sierra & Silverado 4500HD, 5500HD, 6500HD

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2020 Chevrolet Silverado

NHTSA ID Number: 10193467 Manufacturer Communication Number: PIP5742A   Summary This Preliminary information communicates to the dealer technicians that a belt chirp or rubbing noise may be caused by the harmonic balancer out ring moving backward on the pulley and contacting the front cover.     10 Affected Products Vehicles MAKE MODEL YEAR CHEVROLET SILVERADO 1500 2019-2020 … Read more

Malfunction Indicator Lamp (MIL) Illuminated During Engine Crank – DTC P0046 Set – 2017-2023 Chevrolet Silverado & GMC Sierra

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2021 Chevrolet Silverado

NHTSA ID Number: 10222662 Manufacturer Communication Number: 21-NA-113 Summary This technical bulletin provides a procedure to perform a learn procedure for the turbo actuator.   Condition Some customers may comment that the MIL is illuminated. Some technicians may find DTC P0046 (Turbocharger Boost Control Position Performance) set in the Engine Control Module (ECM).   Cause This condition … Read more

Vibration Caused by Tires – 2019-2022 Chevrolet Silverado 4500HD/ 5500HD/6500HD

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2022 Chevrolet Silverado MD 6500

NHTSA ID Number: 10222805 Manufacturer Communication Number: 21-NA-270 Summary This informational bulletin provides information for dealers/technicians on Vibration Caused by Tires.   Condition Some customers may comment on a vibration while driving.   Cause The cause of the condition may be that the wheel and tire assemblies require Road Force balance.   Correction Verify the vibration is … Read more

Information on Accessory All-Weather Floor Liners and Flat Mats Warped or Misshapen – 2021 and Prior GM Passenger Cars and Light Duty Trucks

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2021 Chevrolet Camaro

NHTSA ID Number: 10188401 Manufacturer Communication Number: 21NA026   Summary This service bulletin provides information for dealers/technicians on accessory all-weather floor liners and flat mats warped or misshapen.     429 Affected Products Vehicles MAKE MODEL YEAR BUICK CASCADA 2016-2019 BUICK ENCLAVE 2012-2021 BUICK ENCORE 2013-2021 BUICK ENCORE GX 2020-2021 BUICK ENVISION 2016-2021 BUICK LACROSSE 2012-2019 BUICK … Read more

Rear Air Suspension Inoperative – 2019-2020 Chevrolet Silverado 4500HD, 5500HD & 6500HD

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2019 Chevrolet Silverado 4500-6500

NHTSA ID Number: 10187391 Manufacturer Communication Number: 20NA030   Summary This service bulletin provides a procedure to correct a customer concern of Rear Air Suspension Inoperative.   1 Affected Product Vehicle MAKE MODEL YEAR CHEVROLET SILVERADO 4500HD 2019     Parts Information Causal Part Description Part Number Qty X SPRING, RR AIR 19407642 2 N/A ABSORBER, RR … Read more