Buick Envision, Cadillac Ct4, Cadillac Ct5, Cadillac Escalade, Cadillac Escalade Esv, Chevrolet Corvette, model year 2021. Filed by General Motors, LLC and reported to NHTSA on 10 June 2021. 285,622 vehicles potentially affected.
What the notice says 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 …
Is your vehicle included? Check with your VIN at NHTSA, or ask a dealer. This page is an independent copy of the notice, kept so you can see what changed after it was published. It is not the authority, and the authority’s own text is the one to act on.
General Motors's own number for this recall: N212338110. That is the number on the owner letter and on the dealer paperwork. 21V421 is the number NHTSA gave the same campaign, and the number this page is filed under. They are one recall, written two ways.
What owners ask about this recall
- Which vehicles does recall 21V421 cover?
- Buick Envision, Cadillac CT4, Cadillac CT5, Cadillac Escalade, Cadillac Escalade Esv, Chevrolet Corvette, Chevrolet Suburban, Chevrolet Tahoe, model year 2021.
- What is wrong with them?
- 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.
- What can happen if it is not put right?
- The air bag malfunction indicator light may fail to warn the driver of a problem with the air bag, increasing the risk of injury.
- Is there a fix yet?
- Yes, and it is free. 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.
- What should I do now?
- Check your own vehicle by its VIN with NHTSA, which is the record to act on. General Motors calls this recall N212338110, which is the number on the owner letter and the dealer paperwork.
Answered from the register this site holds. NHTSA is the record to act on.
What the authority says can happen if this is not fixed: “The air bag malfunction indicator light may fail to warn the driver of a problem with the air bag, increasing the risk of injury.”
affected
in the notice
caught
| Campaign | 21V421 |
|---|---|
| Filed by | General Motors, LLC |
| System at fault | Air Bags:SRS Malfunction Warning Lamp/Light |
| Reported to NHTSA | 10 June 2021 |
| Model years | 2021-2021 |
| Vehicles named | BUICK ENVISION, CADILLAC CT4, CADILLAC CT5, CADILLAC ESCALADE, CADILLAC ESCALADE ESV, CHEVROLET CORVETTE, CHEVROLET SUBURBAN, CHEVROLET TAHOE, GMC YUKON, GMC YUKON XL |
This is not an ordinary campaign.
- The remedy is delivered over the air. There may be no garage visit, no invoice and no paper trail the owner ever sees, which is also why a later revision to the wording can pass unnoticed.
What the notice says today
The 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.
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.
What it said before
This campaign is in the register but not yet in the dated wording archive, so we cannot yet say whether its text has moved. It enters the archive on the next pass.
This is one of 846 notices in the record whose component field names air bags. Across that group the median wait before owners were written to was 46 days.
Last checked . No change has been recorded in the wording.
The models named here, across their whole recall history
- Buick Envision recalls: 9 US campaigns
- Cadillac CT4 recalls: 5 US campaigns
- Cadillac CT5 recalls: 6 US campaigns
- Cadillac Escalade recalls: 21 US campaigns
- Cadillac Escalade Esv recalls: 35 US campaigns
- Chevrolet Corvette recalls: 21 US campaigns
- Chevrolet Suburban recalls: 25 US campaigns
- Chevrolet Tahoe recalls: 32 US campaigns
- GMC Yukon recalls: 46 US campaigns
- GMC Yukon XL recalls: 34 US campaigns
How to cite this record
Quoting the wording on this page means quoting a version, so the date belongs in the citation:
CarsMultiverse, recall 21V421, wording as read on 16 September 2026. https://carsmultiverse.com/recall/21v421/
The cross-border matches used on this site are deposited as a citable dataset: doi:10.5281/zenodo.22087136. The recall wording itself is published by the national authority named above and is theirs, not ours.
The recall record and its wording are published by the US National Highway Traffic Safety Administration and are US Government public domain. The dated archive, the comparison and any before-and-after above are CarsMultiverse. How fresh every engine behind this page is, is public on the status page. To check a specific vehicle, use NHTSA’s own VIN lookup.
Other General Motors notices we hold
- 26V530: 2024-2025 Chevrolet Silverado 2500 and GMC Sierra 2500
- 26V496: 2026 Chevrolet Silverado EV and GMC Sierra EV
- 26V494: 2026 Cadillac Escalade IQ, Escalade IQL, GMC Sierra EV, and Chevrolet Silverado EV
- 26V399: 2025-2026 Express, and 2025-2026 Savana
- 26V394: 2026-2027 Cadillac Vistiq
- 26V345: 2026 Chevrolet Express and GMC Savana
- 26V329: 2015 Cadillac Escalade, Escalade ESV, XTS, 2015-2016 Cadillac ATS, CTS, and SRX
- 26V325: 2018 Chevrolet Silverado 1500, GMC Sierra 1500, 2019 Chevrolet Silverado 2500, Silverado 3500, GMC Sierra 2500, and Sierra 3500
All 474 General Motors campaigns we hold · Every manufacturer in the record
The fingerprint of this notice
We take a SHA-256 of each of the three blocks of text the authority publishes and keep the first eight characters. As we last read campaign 21V421 on 23 August 2026, they were:
- Defect summary
7a7cac79 - Consequence
3f6fe5dd - Remedy
d7b4cc01
We first read this notice on 21 August 2026. It has not moved since. If it ever does, these characters will not match, and the change will be dated here.
The wording we hold for 21V421 · how the whole register is watched
This notice names one vehicle among several registers that have written about it. Every notice this site holds for the Cadillac Escalade Esv, in all seven, is kept on that vehicle's own page, with the newest in each.
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