GM bulletin 24-NA-255
What it saysThis technical bulletin provides repair information to correct a customer concern of Air Bag Warning MIL with DTC B14DC. NHTSA’s full summary ↓
GM filed this with NHTSA as a service bulletin dated Nov 14, 2024, received Dec 17, 2024, about the air bags. It names 12 model years across Chevrolet, GMC and Cadillac (2023–2025). A service bulletin is not a safety recall: it is the manufacturer telling its dealers how to diagnose or repair a condition, and whether the work is paid for depends on the warranty in force. Quoting the number at a service desk can save a diagnosis.
One page for every brand it was filed under. Each brand’s bulletins: Chevrolet · GMC · Cadillac.
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What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationThis technical bulletin provides repair information to correct a customer concern of Air Bag Warning MIL with DTC B14DC.
Trouble codes it names: B14DC
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| 24-NA-255 | Service bulletin | Nov 14, 2024 | 11011877 | PDF, 194 KB |
What the document itself lists
Part the bulletin names
| Part number | Description | Qty | Find it |
|---|---|---|---|
| 13530533 | — | 1 |
Labour operation and the time the manufacturer allows
| Operation | Description | Time |
|---|---|---|
| 6486268 | Replace Front Seat Airbag Connector | 1 hrs |
Read by machine from the document NHTSA serves (6 pages), read Sep 30, 2026. A part number is shown only where it matches GM’s own catalogue shape, an operation only with its code and time, and a description only where the reader got it whole; anything it could not settle is left out, and the PDF is the record. Times are the manufacturer’s warranty allowances, not a quote. Listings and prices on eBay Motors are the seller’s.
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The summary is NHTSA’s abstract of the document, as filed under 49 CFR 579.5. One communication is usually filed as several documents — the bulletin, a dealer notice, an owner letter — and the number on any of them finds this page. A PDF link is shown only once NHTSA’s own server has been seen to serve that document; the rest are checked over the following nights. Quote the number at a service desk; it is what the dealer’s system is keyed on.
Model years it names
Source: as the manufacturer filed themChevrolet 6 model years
GMC 3 model years
Cadillac 3 model years
A vehicle page’s bulletin list shows the newest few communications filed against that model year; the count there is every one.
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What owners reported
Source: NHTSA complaint databaseOwners of the 12 model years this bulletin names have filed 1,602 complaints with NHTSA since 2015. 235 of them name Electrical System — the same broad component group this bulletin is filed under. NHTSA groups complaints coarsely, so that means the same area of the vehicle, not necessarily the same fault.
On , at approximately 15,200 miles, my 2025 Cadillac Escalade V developed multiple warnings while I was driving at highway speed. These included reduced acceleration, speed limited to 62 mph, service power steering, service traction control, rear axle system off, and unavailable forward-collision and adaptive-cruise functions.
2025 Cadillac Escalade · Electrical System · filed with NHTSA Sep 5, 2026
I was in a rollover crash on 3/9/25. I hit the guardrail head on, then completely rolled the vehicle multiple times. The driver/steering wheel airbag did NOT deploy. Curtain airbags, and the airbag from the seat deployed but the steering wheel did NOT. My head hit the steering wheel as a result with injuries to my face.
2024 Chevrolet Tahoe · Air Bags · filed with NHTSA Mar 19, 2025
I've had my 2023 Tahoe for 15 months, purchased Dec. 2023 Issue #1. Dash message on start up " Restraint System Needs Service". I noticed small lights overhead (buttons for tail gate, sun roof, reading lamps) were off. I pressed some of them, and dash message went away, and lights came on. Everything worked fine.
2023 Chevrolet Tahoe · Electrical System · filed with NHTSA Mar 2, 2024
A complaint is one owner’s account, not a defect finding, and a bulletin is not a recall. Nothing here says this bulletin was issued because of these complaints, or that the repair it describes fixed them. Complaint files on this site begin in 2015.
More bulletins about the air bags
Source: same model, same component group1 other manufacturer communication filed against these GM models under the same component group (air bags), newest first.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| 21-NA-005 | Service bulletin | Jun 29, 2023 | This technical bulletin provides a procedure to replace the air bag and air bag harness to correct a condition of Airbag Malfunction Warning… |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Chevrolet, GMC and Cadillac, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is GM 24-NA-255 a recall?
No. A service bulletin is a manufacturer communication filed with NHTSA under 49 CFR 579.5; a safety recall carries an NHTSA campaign number (two digits, a letter, six digits) and a federal duty to repair for free. Check the vehicle’s recalls by VIN at nhtsa.gov/recalls, or on its page here.
Is the 24-NA-255 repair free?
Not automatically. A service bulletin describes how to diagnose or repair a condition; who pays depends on the warranty in force, any extension, and the dealer. Quoting the number can save a diagnosis either way.
Which vehicles does 24-NA-255 cover?
The manufacturer filed it against 12 model years across 3 brands (Chevrolet, GMC and Cadillac): 2025 Cadillac Escalade, 2024 Cadillac Escalade, 2023 Cadillac Escalade, 2025 Chevrolet Suburban, 2024 Chevrolet Suburban, 2023 Chevrolet Suburban and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.