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GMC TSB #N202319660
2021 GMC Sierra 1500
TSB Document:
Affected Component: ELECTRICAL SYSTEM:SOFTWARE
- Summary
- Service Update. Certain vehicles may present a broken engine valve spring. This may cause the engine to run rough, an engine knocking or ticking noise, a check engine light illumination, or a possible vehicle stall. Dealers are to perform the inspection procedure contained within this bulletin.
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