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GMC TSB #PIP5621B
2018 GMC Sierra 2500
TSB Document:
Affected Component: POWER TRAIN
- Summary
- This Preliminary information communicates to the dealer  technician that TAC recommends the utilization of the GDS2 software to aid in diagnosing automatic transmission concerns. TAC is requesting the GDS2 session logs be sent in before the dealer contacts TAC.Â
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