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GM vehicles' airbag warning light works inconsistently
medium How serious is it? About this label
The airbag warning light may fail to warn the driver about a problem with the airbag, increasing the risk of injury. The notice does not tell owners to stop driving.
Key facts
| NHTSA campaign number | 21V421000 |
|---|---|
| Reported to NHTSA | Jun 10, 2021 |
| Manufacturer | General Motors, LLC |
| Part affected | AIR Bags:srs Malfunction Warning Lamp/light |
| Vehicles covered | 10 model/year combinations, model years 2021 |
| Do-not-drive advisory | No |
| Park-outside advisory | No |
| Repair | Free at any franchised dealer; this one can be delivered as an over-the-air software update |
What's wrong, in plain English
General Motors is recalling certain Buick, Cadillac, Chevrolet and GMC vehicles. The module that passes messages between vehicle systems does not correctly handle a loss of communication with the airbag sensing module. As a result, the airbag warning light on the dashboard turns on inconsistently. A dealer can update that module's software, or the update can be sent to the vehicle over the air, free of charge. GM mailed owner notification letters on July 1, 2021.
What you should do
Where do I find my VIN, and what do I tell the dealer?
Your VIN is the 17-character code on the lower left of the windshield, on your registration and usually on your insurance card. Enter it at nhtsa.gov/recalls to see whether this recall is still open on your car. When you call the dealer, say you have an open safety recall and give them NHTSA campaign number 21V421000. More in how recalls work.
Affected vehicles (10)
Who to contact
Buick — official Buick recall lookup
Customer service: 1-800-521-7300
Cadillac — official Cadillac recall lookup
Customer service: 1-800-458-8006
Chevrolet — official Chevrolet recall lookup
Customer service: 1-800-222-1020
GMC — official GMC recall lookup
Customer service: 1-800-462-8782
The bigger picture
- Buick Air Bag Recalls Cover Deployment and Warning Light Problems · all 5 Buick recalls in this area
- Cadillac Air Bag Recalls Cover Deployment and Warning Light Problems · all 4 Cadillac recalls in this area
- Chevrolet Air Bag Recalls Cover Deployment, Sensors, and Mounting Problems · all 19 Chevrolet recalls in this area
- GMC Air Bag Recalls Cover Inflator Ruptures and Deployment Problems · all 11 GMC recalls in this area
Other Chevrolet Tahoe recalls
- May 14, 2026Cadillac, Chevrolet, GMC SUVs Have Wrong Wheel Boltshigh
- May 7, 2026Chevrolet Tahoe, GMC Yukon Wheels Can Lock Upcritical
- Feb 13, 2026Cadillac, Chevrolet, GMC SUVs Rear Wheel Lockuphigh
- Sep 18, 2025Cadillac, Chevy, GMC SUVs Have Wrong Fuel Tankcritical
- Apr 24, 2025GM Trucks and SUVs Engine May Failhigh
- Oct 24, 2024Diesel GM trucks, SUVs risk rear wheel lock-uphigh
Official notice
- Component
- AIR BAGS:SRS MALFUNCTION WARNING LAMP/LIGHT
- 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 risk
- The air bag malfunction indicator light may fail to warn the driver of a problem with the air bag, increasing the risk of injury.
- 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. (over-the-air software update)
Verify your specific vehicle by VIN at nhtsa.gov. Recall repairs are free of charge by law.