4WD

Engineering Information – Service 4WD Message Illuminated On the Drivers Information Center (DIC), DTC C15AC Set – 2020-2021 Chevrolet Silverado & GMC Sierra 2500HD/3500HD

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2021 Chevrolet Silverado

NHTSA ID Number: 10187740 Manufacturer Communication Number: PIE0604   Summary GSA Example: This engineering informational bulletin is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to the service 4WD message illuminated on the drivers information center (DIC).   4 Affected Products Vehicles MAKE MODEL YEAR CHEVROLET SILVERADO 2500 … Read more

Whine Noise Operating In 4WD – 2015-2018 Chevrolet Silverado & GMC Sierra

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2018 Chevrolet Silverado

NHTSA ID Number: 10126957 Manufacturer Communication Number: PIP5245B Summary This Preliminary Information communication provides information to the technician on how to diagnose vehicles with various noises associated with four wheel drive operation. Before beginning any diagnosis it is imperative to review the Symptoms – Transfer Case in Service Information and perform the necessary inspections. In all cases … Read more

Service 4wd Message With DTC C0392 or C0396 Stored In TCCM – 2014-2018 Chevrolet GMC Cadillac

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2016 Chevrolet Silverado

NHTSA ID Number: 10144458 Manufacturer Communication Number: PIP5304B Summary This Preliminary Information communication provides information to the technician about vehicles that have a “Service 4WD Message” displayed in the Driver Information Center. Technician may find Diagnostic Trouble Codes C0392 or C0396. Technician should check the terminal tension on the Transfer Case Control Module X1 connector. Technician should … Read more

Service 4WD Message Displayed In DIC – 2015-2016 Chevrolet Colorado & GMC Canyon

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2016 Chevrolet Colorado

NHTSA ID Number: 10114936 Manufacturer Communication Number: PIP5256B   Summary This Preliminary Information communication provides information to the technician about vehicles that may have a Service 4WD message displayed in the Instrument Panel Cluster. Technician may find diagnostic trouble code B2725 or B0770 in the Transfer Case Control Module. Technician will need to replace the Transfer Case … Read more