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 |
| 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.
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.
A vehicle with no link is not in this site's catalog, which covers cars, multipurpose vehicles and trucks by model year. The campaign is from data as of 2026-10-19.
Bulletins for the same vehicles and component
| 24-NA-066 | 2024-04-10. Service bulletin. This service bulletin provides repair information for technicians that may be Unable to Complete Serial Data Authentication on the vehicle. |
|---|---|
| 20-NA-132 | 2024-04-05. Service bulletin. This warranty administration bulletin provides policy information on the requirements for 12V battery testing and warranty replacements. |
| N23-241027 | 2023-08-25. Service bulletin. '(There may be future updates under this same release number.) Your Buick Envision keeps getting better. This software update includes the following, if your vehicle is equipped: Refinements: •Updates made to improve the Automated Heated Seat functionality. •Updates made to the overall vehicle software update process. •Updates made to improve connectivity within Apple CarPlay. •A variety of other minor software updates to make your driving and in-vehicle experience better. Better Never Stops™ |
| N23-241156 | 2023-08-04. Service bulletin. '(There may be future updates under this same release number.) Your vehicle keeps getting better. This vehicle software update includes the following: Refinements: •Updates made to the overall vehicle software update process. Better Never Stops™ |
| N23-241010 | 2023-06-24. Service bulletin. (There may be future updates under this same release number.) Your Chevrolet Corvette keeps getting better. This vehicle software update includes the following: Refinements: Updates made to the overall vehicle software update process. Better Never Stops™ |
| N23-241010 | 2023-06-24. Service bulletin. (There may be future updates under this same release number.) Your Chevrolet Corvette keeps getting better. This vehicle software update includes the following: Refinements: Updates made to the overall vehicle software update process. Updates made to the air conditioning system to maintain consistent cooling performance. Updates made to the radio display graphics and audio connectivity while using OnStar & SiriusXM. Updates made to the headlamp functionality to improve the ease of use. A variety of other minor software updates to make your driving and in-vehicle experience better. Better Never Stops™ |
| PIT5762F | 2023-02-13. Service bulletin. This Preliminary information communicates an issues with false codes setting in vehicles due to timing issues between the modules. |
| PIP5632G | 2023-01-30. Service bulletin. This Preliminary Information communication provides information to the technician that General Motors Technical Assistance Center may ask for Global Diagnostic System 2 Session Log. Technician will need use Global Diagnostic System 2 to send the session logs to General Motors Technical Assistance Center for further assistance on the vehicle in question. |
| PIP4902Q | 2023-01-30. Service bulletin. This Preliminary Information communication provides information to the technician that General Motors Technical Assistance Center may ask for Global Diagnostic System 2 Session Log. Technician will need use Global Diagnostic System 2 to send the session logs to General Motors Technical Assistance Center for further assistance on the vehicle in question. |
| PIT5832D | 2022-12-12. Service bulletin. This Preliminary information communicates a diagnostic tip on how to resolve a issue if the serial data authentication configuration did not complete correctly. |
A bulletin is the manufacturer's note to its dealers. It is not part of this recall.