GroundworkCare you can keep track of.
← Recall guides

Airbags, seat belts and seats · UNITED STATES

21V421000: Airbags, seat belts and seats recall for BUICK ENVISION and 9 other models

BUICK ENVISION and 9 other models: check the listed vehicles, the reported issue and the manufacturer remedy for 21V421000. Keep the official status and service answers in one private record.

Official record checked 2026-10-19 UTC · Filing date 2021-06-10

Start with the specific vehicle

The report lists 10 model-year entries. Read the equipment and production restrictions in the reported issue, then use the official lookup or manufacturer to establish whether this campaign applies to your vehicle.

View the listed model years
  • 2021 BUICK ENVISION
  • 2021 CADILLAC CT5
  • 2021 CADILLAC CT4
  • 2021 CHEVROLET TAHOE
  • 2021 CHEVROLET SUBURBAN
  • 2021 GMC YUKON
  • 2021 GMC YUKON XL
  • 2021 CADILLAC ESCALADE
  • 2021 CADILLAC ESCALADE ESV
  • 2021 CHEVROLET CORVETTE

Check your VIN on NHTSA →

Enter the VIN only on the official service or manufacturer site. This worksheet does not ask for it.

What the official report 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 malfunction indicator light to inconsistently illuminate.

Official NHTSA campaign record

Why the reported issue matters

The air bag malfunction indicator light may fail to warn the driver of a problem with the air bag, increasing the risk of injury.

Official NHTSA campaign record

Prepare your observation

Use vehicle documents and existing service records. Leave airbag, belt and seat disassembly or deployment testing to the service provider.

A reported defect describes the campaign. It does not establish what caused a symptom on your individual vehicle, and absence of a symptom does not establish that an open recall is complete.

The reported 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.

Official NHTSA campaign record

Confirm current remedy arrangements

The source does not explicitly establish current remedy availability. Ask the manufacturer about the applicable remedy, required parts or software, appointment arrangements and any interim instructions.

This describes the dated source record. Current arrangements for your VIN remain unconfirmed.

Additional official 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.

View the source

Choose the next step from the official result

Not checked or unavailable

Keep eligibility unconfirmed. Use the official lookup or contact the manufacturer with 21V421000.

This campaign is open

Confirm current interim instructions, remedy availability and service arrangements. Keep the dated answer.

Not listed as open

Review earlier repair records and lookup limits if needed. A zero-open result does not explain an unresolved symptom.

Work order records recall work

Keep the campaign number, remedy and date together. Ask separately about a symptom that remains after the visit.

Your campaign-specific service questions

Use these questions with the official report. Keep the answers beside the remedy record; “discussed” records a conversation, not a completed repair.

  1. Does the manufacturer confirm that campaign 21V421000 applies to this VIN, including the report’s equipment and production restrictions?

    A matching model and year is only a starting point. The official lookup or manufacturer must establish the individual vehicle’s status.

  2. What remedy, required parts or software, and appointment arrangements are currently available for this VIN, and which interim instructions apply?

    The source does not explicitly establish current remedy availability. Ask the manufacturer about the applicable remedy, required parts or software, appointment arrangements and any interim instructions.

  3. Which seating position or restraint component is included, and does the manufacturer give any interim occupancy instruction for this VIN?

    Compare the answer with the reported components: AIR BAGS:SRS MALFUNCTION WARNING LAMP/LIGHT; ELECTRICAL SYSTEM:SOFTWARE.

  4. Which module and software completion record demonstrate that the update for 21V421000 was applied?

    The source identifies an over-the-air update option. Ask how completion is confirmed for this vehicle; a downloaded update or notification is not itself a service record.

  5. What dated document records the remedy performed under 21V421000, and what should I do if the reported concern remains?

    Keep campaign completion and unresolved symptoms as separate questions. A saved worksheet or booked appointment does not establish a repair.

Download the full guide and blank worksheet

Source and lookup coverage

NHTSA 21V421000: official campaign data · Official lookup and coverage limits

The quoted issue, consequence and remedy come from the official record as checked above. This independent guide adds a vehicle-check decision process, service questions and a private worksheet. Confirm current eligibility, remedy availability and interim instructions with the manufacturer.

The official VIN lookup may omit completed recalls, some recent campaigns and recalls outside its coverage. Vehicle notes and answers stay in this browser. A downloaded brief contains your notes; keep it appropriately. Groundwork is independent of NHTSA and the manufacturer.