GMC TSB #N232430460
2020 GMC Sierra 1500
Affected Component: ENGINE AND ENGINE COOLING
- Summary
- Special Coverage. Certain vehicles may have a condition that could cause the engineâs cylinder 2 glow plug to fail. If this condition occurs, the Malfunction Indicator Lamp (Check Engine Light) will illuminate, and a diagnostic trouble code will set. Dealers are to replace the cylinder 2 glow plug as necessary. The repairs will be made at no charge to the customer.