GMC TSB #PIP5700E
2021 GMC Sierra 1500
Affected Component: ELECTRICAL SYSTEM
- Summary
- This Preliminary information communicates to the dealer technician that the part numbers for the internal wiring harnesses for the 8 speed RWD transmissions are not listed in the Electronic Parts Catalog. Technicians are to refer to the information provided in this document to obtain the internal wiring harness part numbers by application.