Chevrolet Silverado 1500, Chevrolet Silverado 2500, Chevrolet Silverado 3500, Gmc Sierra 1500, Gmc Sierra 2500, Gmc Sierra 3500, model years 2015 to 2016. Filed by General Motors, LLC and reported to NHTSA on 1 July 2021. 410,019 vehicles potentially affected.
What the notice says General Motors LLC (GM) is recalling certain 2015-2016 GMC Sierra 1500, 2500, 3500, and Chevrolet Silverado 1500, 2500, and 3500 trucks. The roof-rail air bag (RRAB) inflator end cap may detach from the inflator, or the inflator sidewall may rupture.
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: N202324251. That is the number on the owner letter and on the dealer paperwork. 21V504 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 21V504 cover?
- Chevrolet Silverado 1500, Chevrolet Silverado 2500, Chevrolet Silverado 3500, GMC Sierra 1500, GMC Sierra 2500, GMC Sierra 3500, model years 2015-2016.
- What is wrong with them?
- General Motors LLC (GM) is recalling certain 2015-2016 GMC Sierra 1500, 2500, 3500, and Chevrolet Silverado 1500, 2500, and 3500 trucks. The roof-rail air bag (RRAB) inflator end cap may detach from the inflator, or the inflator sidewall may rupture.
- What can happen if it is not put right?
- A separated inflator end cap or inflator rupture can allow compressed gas to escape, resulting in the end cap or other components being propelled into the vehicle, increasing the risk of injury or crash.
- Is there a fix yet?
- Not yet, on the wording NHTSA publishes today. Dealers will replace the left and right side RRAB modules, free of charge. Interim owner notification letters informing owners of the safety risk were mailed on August 18, 2021. Owners will receive a second notice when the remedy is available.
- 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 N202324251, 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: “A separated inflator end cap or inflator rupture can allow compressed gas to escape, resulting in the end cap or other components being propelled into the vehicle, increasing the risk of injury or crash.”
affected
in the notice
caught
| Campaign | 21V504 |
|---|---|
| Filed by | General Motors, LLC |
| System at fault | Air Bags:Side/Window:Curtain:Inflator |
| Reported to NHTSA | 1 July 2021 |
| Model years | 2015-2016 |
| Vehicles named | CHEVROLET SILVERADO 1500, CHEVROLET SILVERADO 2500, CHEVROLET SILVERADO 3500, GMC SIERRA 1500, GMC SIERRA 2500, GMC SIERRA 3500 |
What the notice says today
The consequence
A separated inflator end cap or inflator rupture can allow compressed gas to escape, resulting in the end cap or other components being propelled into the vehicle, increasing the risk of injury or crash.
The remedy
Dealers will replace the left and right side RRAB modules, free of charge. Interim owner notification letters informing owners of the safety risk were mailed on August 18, 2021. Owners will receive a second notice when the remedy is available. Phase I owner notification letters were mailed on May 5, 2022. Phase II owner notification letters are expected to be mailed on May 31, 2022. Owners may contact GMC customer service at 1-888-988-7267 or Chevrolet customer service at 1-800-222-1020. This recall supersedes NHTSA recall number 20V-736. GM's number for this recall is N202324251.
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
- Chevrolet Silverado 1500 recalls: 52 US campaigns
- Chevrolet Silverado 2500 recalls: 37 US campaigns
- Chevrolet Silverado 3500 recalls: 37 US campaigns
- GMC Sierra 1500 recalls: 50 US campaigns
- GMC Sierra 2500 recalls: 35 US campaigns
- GMC Sierra 3500 recalls: 36 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 21V504, wording as read on 16 September 2026. https://carsmultiverse.com/recall/21v504/
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 21V504 on 23 August 2026, they were:
- Defect summary
a96f21fe - Consequence
634e8d76 - Remedy
c51c669e
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 21V504 · 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 Chevrolet Silverado 1500, in all seven, is kept on that vehicle's own page, with the newest in each.
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Owners of these cars
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