3500HD

Rear Wheel Lock Up, ABS Event, Loud Bang and a Flashing “D” on Driver Information Center (DIC) when Lightly or Moderately Accelerating, Forcing an 8-7 or 8-6 Downshift – 2019-2021 Cadillac Chevrolet GMC

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Chevrolet GMC Cadillac

NHTSA ID Number: 10219291 Manufacturer Communication Number: 21-NA-275 Summary This service bulletin provides repair information to correct customer concerns of Rear Wheel Lock Up, ABS Event, Loud Bang and a Flashing “D” on Driver Information Center (DIC) when Lightly or Moderately Accelerating Forcing an 8-7 or 8-6 Downshift.   Condition Some customers may comment on the following … Read more

Information on Mimamori ECU Download (Health Report) – 2016-2023 Chevrolet Medium Duty (LCF)

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2021 Chevrolet 6500XD

NHTSA ID Number: 10219280 Manufacturer Communication Number: 17-NA-050 Summary This service bulletin explains how a health report is required when doing repairs on MD LCF vehicles.   Information Important: Perform the Mimamori ECU download before clearing the DTC and before diagnosing the vehicle. In an effort for continuous improvement, there is a need to obtain Mimamori ECU … Read more

N212354521 Heated Vented Seats Retrofit Due to Chip Shortage – Front Seats Only – 2022 Chevrolet & GMC

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Chevrolet & GMC

NHTSA ID Number: 10224369 Manufacturer Communication Number: N212354521-01 Summary Customer Satisfaction Program. Due to the industry-wide semiconductor shortage, the front heated/ventilated seats, front heated seats, or rear heated seats are not functional on certain 2022 model year vehicles listed above, built beginning November 15, 2021. The affected vehicle owners should have been made aware of the condition … Read more

Rattle Noise from Driver’s Side Dash Area – 2020-2022 Chevrolet Silverado & GMC Sierra 2500HD/3500HD

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2022 Chevrolet Silverado 2500

NHTSA ID Number: 10202395 Manufacturer Communication Number: PIT5853 Summary This Preliminary information communicates information on correcting a rattle noise on driver side of cowl heat shield.   Condition Some customers may comment on a rattle noise from the driver side dash area in park at idle or while driving.   Cause The retainer clips that hold the … Read more

Transfer Case Input Seal Installation – 2020-2023 Chevrolet Silverado & GMC Sierra 2500HD/3500HD

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2021 Chevrolet Silverado

NHTSA ID Number: 10224291 Manufacturer Communication Number: PIP5810A Summary This Preliminary information communicates that the tool for the HD transfer cases to install the input seal during a repair is incorrect and a new tool is in development.   Condition Transfer case input seal installation tool will not install seal to correct depth causing a leak.   … Read more