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NHTSA campaign 21V421000 · Manufacturer campaign N212338110

General Motors, LLC Recall 21V-421: Air Bag Light May Not Indicate Malfunction

NHTSA recall 21V421000 (Manufacturer campaign N212338110) was reported by General Motors, LLC on June 10, 2021, with 285,622 vehicles potentially affected (per NHTSA). NHTSA's record lists the Buick Envision, Cadillac CT4, Cadillac CT5 and more for the 2021 model year. Owners were notified on July 1, 2021, per NHTSA.

Updated daily from NHTSA's recall files

Is my vehicle included?

This page lists, by model year, the vehicles NHTSA's recall record names for campaign 21V421000 in the model years try.vin imports (1995 and later); NHTSA's own record can list more. A model year on the list doesn't mean every vehicle of that year is included, and some may already have been repaired.

To see whether a specific vehicle is included and still needs the repair, enter its VIN at nhtsa.gov/recalls.

Free VIN check: decode a VIN to see its year, make and model.

Key facts

NHTSA campaign
21V421000 (also written 21V-421 or 21V421)
Filed by
General Motors, LLC
Manufacturer campaign number
N212338110
Report received
Potentially affected
285,622 vehicles (per NHTSA)
Component
Air Bags — SRS Malfunction Warning Lamp/Light
Owners notified

Repair completion: 99.11% (latest rate the manufacturer reported to NHTSA; dataset updated October 21, 2026)

NHTSA cautions against comparing completion rates across recalls or manufacturers. How try.vin reads them.

Vehicles listed for this recall

NHTSA's recall record lists these vehicles for recall 21V421000. try.vin imports model years 1995 and later, so NHTSA's own list can be longer. Model years with a try.vin recall page link to it. Build dates are NHTSA's range for a model year (per NHTSA); a vehicle built in that range is not necessarily included.

Buick

All Buick recalls

Cadillac

All Cadillac recalls

Chevrolet

  • Chevrolet Corvette

  • Chevrolet Suburban

  • Chevrolet Tahoe

All Chevrolet recalls

GMC

All GMC recalls

NHTSA's recall notice

As NHTSA's recall record states it for campaign 21V421000.

Defect description

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.

Manufacturer 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.

Notes

Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.nhtsa.gov.

Sources

Official NHTSA notice for recall 21V421000

Campaign details come from NHTSA's recall files, which try.vin imports once a day. The plain-language subject and the completion rate come from the U.S. Department of Transportation's Recalls Data dataset. How try.vin reads recall data.