January 19: GM Engine Failure Recall Investigation Opened investigations | 1 days ago
January 2: GM Says Brake Master Cylinder Failure Lawsuit Fails news | 18 days ago
December 28: GM Lifter Failure Lawsuit Includes Multiple Models news | 23 days ago
December 22: GM Air Conditioning Class Action Lawsuit: 8 Years in Court news | 29 days ago
December 7: GM Engine Class Action Lawsuit Set To Begin news | 44 days ago
GMC TSB #21NA255
2019 GMC Terrain
TSB Document:
Affected Component: ELECTRICAL SYSTEM:IGNITION:COIL:SPARK PLUGS
- Summary
- This service bulletin provides repair information to correct a customer concern of an Engine Misfire, Malfunction Indicator Lamp (MIL) Illuminated - DTC P0300 Set.
Click a tab for more information.




