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GMC TSB #PIP5369C
2015 GMC Sierra 1500
Affected Component: ELECTRICAL SYSTEM: SOFTWARE
- This Preliminary Information communication provides information to the technician about vehicles that have "Service 4 Wheel Drive" message on the Driver Information Center. Provides the technician with additional information to ensure that the TCCM contains the latest software released to address previous issues, also advises of default action changes. Calls out specific circuits to be inspected to help isolate intermittent codes.
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