# NHTSA recall 21V421000

A recall listed here may apply to a vehicle of this year, make and model. Only the manufacturer can say whether it applies to one vehicle: check the VIN with the official lookups.

- Published by: NHTSA \(United States\)
- Campaign number: 21V421000
- Manufacturer's number: N212338110
- Manufacturer: General Motors, LLC
- Reported: 2021\-06\-10
- Owners notified: 2021\-07\-01
- Component: AIR BAGS:SRS MALFUNCTION WARNING LAMP/LIGHT; ELECTRICAL SYSTEM:SOFTWARE
- Units potentially affected: 285622
- Part numbers: 13542878

## What is wrong

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.


## What can happen

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.


## 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.


## Remedy progress the manufacturer reported

- Report: Annual report 3, for 2025 quarter 3 to 2026 quarter 2
- Filed with NHTSA: 2026\-07\-16
- Vehicles in the campaign: 285622
- Reported remedied: 283038 \(99%\)
- Reported unreachable: 109
- Reported removed: 31

These are the manufacturer's totals for the whole campaign at the end of 2026 quarter 2, as filed with NHTSA. They do not say whether one vehicle has been remedied: check the VIN with the official lookups. The reports are from data as of 2026\-10\-19.

## Vehicles this campaign lists

- [2021 BUICK ENVISION](/makes/buick/envision/2021/recalls.md)
- [2021 CADILLAC CT4](/makes/cadillac/ct4/2021/recalls.md)
- [2021 CADILLAC CT5](/makes/cadillac/ct5/2021/recalls.md)
- [2021 CADILLAC ESCALADE](/makes/cadillac/escalade/2021/recalls.md)
- [2021 CADILLAC ESCALADE ESV](/makes/cadillac/escalade-esv/2021/recalls.md)
- [2021 CHEVROLET CORVETTE](/makes/chevrolet/corvette/2021/recalls.md)
- [2021 CHEVROLET SUBURBAN](/makes/chevrolet/suburban/2021/recalls.md)
- [2021 CHEVROLET TAHOE](/makes/chevrolet/tahoe/2021/recalls.md)
- [2021 GMC YUKON](/makes/gmc/yukon/2021/recalls.md)
- [2021 GMC YUKON XL](/makes/gmc/yukon-xl/2021/recalls.md)

## Bulletins for the same vehicles and component

A bulletin is the manufacturer's note to its dealers. It is not part of this recall.

- [24\-NA\-066](/bulletins/10252993.md), 2024-04-10, Service bulletin
- [20\-NA\-132](/bulletins/10252774.md), 2024-04-05, Service bulletin
- [N23\-241027](/bulletins/10241227.md), 2023-08-25, Service bulletin
- [N23\-241156](/bulletins/10240451.md), 2023-08-04, Service bulletin
- [N23\-241010](/bulletins/10237985.md), 2023-06-24, Service bulletin
- [N23\-241010](/bulletins/10237984.md), 2023-06-24, Service bulletin
- [PIT5762F](/bulletins/10231623.md), 2023-02-13, Service bulletin
- [PIP5632G](/bulletins/10230683.md), 2023-01-30, Service bulletin
- [PIP4902Q](/bulletins/10230682.md), 2023-01-30, Service bulletin
- [PIT5832D](/bulletins/10227671.md), 2022-12-12, Service bulletin

## Check a VIN

- [NHTSA recall lookup by VIN, United States](https://www.nhtsa.gov/recalls)
- [Transport Canada recall search, Canada](https://wwwapps.tc.gc.ca/Saf-Sec-Sur/7/VRDB-BDRV/search-recherche/menu.aspx?lang=eng)

JSON: [/v1/recalls/nhtsa/21V421000](/v1/recalls/nhtsa/21V421000)

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