Air bag light may not indicate malfunction
Defect Summary
General motors, llc (gm) is recalling certain 2021 buick envision, cadillac ct4, ct5, escalade, escalade esv, chevrolet tahoe, corvette, suburban, gmc yukon, yukon xl vehicles. the communications gateway module incorrectly processes a loss of communication with the sensing diagnostic module (sdm), causing the air bag malfunction indicator light to inconsistently illuminate.
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.
Corrective Action
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.
Similar Recalls
Other recalls from General Motors, Llc or involving Air Bags.
FAQ: Recall 21V421000
Your rights, the repair process, and what each field on this page means.
What is recall 21V421000?
NHTSA recall 21V421000 was issued by General Motors, Llc on June 10, 2021. It addresses: Air bag light may not indicate malfunction. The recall affects approximately 285,622 vehicles, with the defect involving the Air Bags component.
How do I get this recall repaired?
Contact any authorized General Motors, Llc dealer and reference NHTSA recall ID 21V421000 or the manufacturer campaign number N212338110. Under federal law, the repair is completely free regardless of vehicle age or owner history.
Is my vehicle included in this recall?
The only way to confirm is to look up your 17-character VIN at nhtsa.gov/recalls. NHTSA's tool will tell you if VIN-by-VIN this exact recall applies.
How long do I have to get a recall repair done?
There is no expiration on most federal safety recalls. Even if your vehicle is years old and you bought it used, the manufacturer is required to perform the repair at no cost.
Where does the data on this page come from?
All information on this page is sourced directly from the U.S. Department of Transportation public dataset for NHTSA recalls. Last refreshed: 2026-05-22. For the most current official notice, visit nhtsa.gov/recalls.