Safety consequence
The air bag malfunction indicator light may fail to warn the driver of a problem with the air bag, increasing the risk of injury.
Official remedy
The communications gateway module software will be updated by a dealer, or through an over-the-air (OTA) update, free of charge. Owner notification letters were mailed on July 1, 2021. Owners may contact Buick customer service at 1-800-521-7300, Cadillac customer service at 1-800-458-8006, Chevrolet customer service at 1-800-222-1020, or GMC customer service at 1-800-462-8782. GM's number for this recall is N212338110.
Repair completion history
Campaign-level completion reporting. This does not determine whether a particular VIN has been repaired.
Vehicle configurations connected to 21V421000
Owner action
Campaign pages describe the public recall record. To determine whether your specific vehicle has an unrepaired recall, use your VIN and verify the current status through NHTSA.