Service Update
January 22, 2021
Service Update N202319660 Valve Spring Failure – 2021 Cadillac Chevrolet GMC
NHTSA ID Number: 10184527 Manufacturer Communication Number: N202319660 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.