CADILLAC, CHEVROLET, GMC

GCUS-9-286

2015-09-16 · NHTSA 10123492

A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.

Manufacturer summary

Original wording in English

15304 - Service Update. This bulletin provides a service procedure to reprogram the transfer case control module on the vehicles listed above. In low ambient temperatures, below 5°F (-15°C) a transfer case brake motor assembly malfunction may occur. Diagnostic Trouble Code (C0398 - Range Position Correlation Fault) will be set, locking the transfer case in ?4HI? until the vehicle is serviced. This software update also addresses other transfer case control issues for overall improved drivability.

Repeated filings are grouped only when make, bulletin number, publication date and complete summary agree. Original record numbers are retained. Older publications remain available, and an explicit later version is shown when established. Pre-1994 vehicle associations are separated from default results; an unspecified year does not mean all model years apply.