NHTSA campaign number
21V421000
Airbag system issue — affecting 9 model years across Buick, Cadillac, Chevrolet, GMC.
- Issued
- Manufacturer
- General Motors, LLC
- Model years
- 2021
- System
- Airbags
Elevated severity
This campaign addresses a defect NHTSA classifies as carrying elevated crash or injury risk.
What the defect is
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.
Why it matters
The air bag malfunction indicator light may fail to warn the driver of a problem with the air bag, increasing the risk of injury.
The 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.
The manufacturer reports this remedy can be delivered as an over-the-air software update — a workshop visit may not be required.
What this page does not include
NHTSA's public recall feed does not supply an affected-population count, the manufacturer's own campaign number, owner-notification dates or a defect chronology for this campaign. Rather than estimate them, we omit them. Confirm whether a specific vehicle is affected — and whether the repair has already been done — using its VIN.
Check a VINVehicles affected by this campaign
9 model years in our index. Coverage reflects the vehicles VerifyTheVehicle tracks, which may be narrower than the full campaign population.