Recall 21V421000: Air Bags:srs Malfunction Warning Lamp/light
Official campaign-level recall information with affected vehicle links and a VIN-first buyer check.
Reviewed June 2026 from NHTSA recall campaign records. Carchieve is independent and not affiliated with any vehicle manufacturer or government agency.
Recall 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.
Recall 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.
Frequently asked questions
What is recall campaign 21V421000?
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.
How do I know if this recall applies to my car?
Use the exact 17-character VIN. A campaign can affect only certain production ranges, trims or equipment configurations.
Are recall repairs free?
Safety recall remedies are generally performed by franchised dealers at no charge when the exact VIN is affected and the remedy is available.
Check the exact VIN before you buy
Model-level pages show public safety patterns. A full VIN report helps confirm the exact vehicle, decoded specs, recall applicability and buyer checks.
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