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GMC TSB #PIE0676
2021 GMC Sierra 1500
TSB Document:
Affected Component: POWER TRAIN
- Summary
- This engineering information (EI) is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to Engine Coolant Reservoir Being Overfilled with Discolored Coolant, Shudder, Shake, Vibration, Harsh Shift, Delayed Shift and/or Slipping Transmission Performance.
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