A customer phoned General Motors on July 20, 2026, to report that the left roof-rail air bag in a 2016 Silverado 1500 had ruptured shortly after the driver set off. That one call grew into a recall of 1,559 Chevrolet Silverado and GMC Sierra pickups, all built in a window of roughly two weeks in the spring of 2016.
GM’s Safety Field Action Decision Authority decided on September 17 to recall every roof-rail inflator that came from a single supplier lot, and NHTSA received the filing on September 24, 2026.
Cracked canisters and leftover wash water
GM’s defect report to NHTSA traces the problem to the inflator itself. The roof-rail air bag inflator’s end cap may separate, or the inflator sidewall may split, and the report ties that to a small crack in the canister left over from manufacturing combined with residual water from the washing step. Over time, the two together can produce stress corrosion cracking.
The consequence, in the NHTSA campaign record, is that a detached end cap or ruptured inflator releases compressed gas and can send the end cap or metal fragments into the cab. The component is the side or window curtain inflator, supplied by Joyson Safety Systems from its plant in Valle Hermoso, Mexico. The affected assemblies carry part numbers 23366021 and 23366022, and the suspect inflators all came from supplier lot B116B.
Investigators moved quickly after that first call, and the sequence is short enough to lay out in full. A GM investigator filed a report on July 21 through the company’s Speak Up For Safety program, and an initial inspection on August 28 found a split sidewall along with damage to the headliner and roof. Twenty days later, on September 17, the decision authority met and settled on the lot-based recall, with the dealer notice going out the same day the filing reached NHTSA. GM told NHTSA it knows of no other ruptures from the lot, so the only failure described in the report is the one truck.
Crew Cab trucks built April 30 to May 11, 2016
Only Crew Cab configurations are involved. The 1,559 break down as 723 Silverado 1500 pickups, 292 Silverado 2500, 33 Silverado 3500, 329 Sierra 1500, 145 Sierra 2500 and 33 Sierra 3500, all from model year 2016, plus two 2017 Silverado 1500 and two 2017 Sierra 1500 trucks that were built in early May 2016.
Build dates run from April 30 to May 11, 2016 for the 1500 series, and from May 4 to May 10 for the heavier-duty 2500 and 3500 trucks. GM estimates that about 1 percent of the vehicles in the population actually carry the defect, which fits a recall drawn around one supplier lot and not an entire model line. The 1% figure is GM’s own estimate of the defect rate within the 1,559, not a count of confirmed failures, and nothing in the report converts it into a number of trucks.
This is not the first roof-rail inflator recall to land on GM full-size pickups. A July 2025 recall covered Sierra pickups from later model years for the same end-cap and sidewall symptoms, with the inflator supplier then known as Key Safety Systems, now Joyson. NHTSA’s report for the current campaign leaves the related-recall field blank, so the two are not formally linked in NHTSA’s paperwork, even though the symptoms read alike. A roof-rail inflator, unlike a driver-side unit, sits above the headliner and fires along the length of the cabin to protect occupants’ heads in a side impact or rollover, which is why a fragment that works loose has a direct path to a seated passenger.
Replacement modules and a do-not-drive advisory
Dealers will replace both the left and right roof-rail air bag modules at no cost, using parts that GM says were built outside the supplier’s suspect production window. GM’s filing carries a “Do Not Drive” and “Park Outside” advisory to the population, an unusually firm instruction for a defect that GM puts in perhaps 1 in 100 trucks. Dealers were notified on September 24, owner letters are scheduled for about November 9, and GM’s own recall number is N262569920.
On injuries, GM told NHTSA that it knows of no other ruptures from the lot. The occupants in the July event reported ringing in their ears, and the report lists no other injuries. Kelley Blue Book’s account of the filing makes the same distinction between that single report and the broader population.
Owners can reach Chevrolet customer service at 1-800-222-1020 and GMC at 1-888-988-7267. The row is also published in the agency’s recall dataset as “Air Bag Inflator Endcap May Detach.”
The one thing the filing does not settle is how GM will cover the weeks between now and November 9 for owners told to park outdoors: the report says reimbursement will follow GM’s general plan on file and describes no separate program for these trucks.
This article was produced with the assistance of AI and reviewed by Morning Overview editors prior to publication.
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