GM over-the-air update 654.20
What it saysFixes to help ensure successful vehicle software updates. NHTSA’s full summary ↓
GM filed this with NHTSA as an over-the-air update dated Feb 27, 2026, received Dec 2, 2025 — 17 documents under this number. It names 36 model years across Chevrolet, GMC, Buick and Cadillac (2023–2026). An over-the-air update is not a safety recall — there is no NHTSA campaign number and no federal requirement — but it is usually work the manufacturer pays for on the vehicles it names; the dealer checks the VIN against the manufacturer’s list.
One page for every brand it was filed under. Each brand’s bulletins: Chevrolet · GMC · Buick · Cadillac.
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What the bulletin says
Source: NHTSA's summary of the manufacturer's communication• Fixes to help ensure successful vehicle software updates. • Improvements to brake performance and diagnostics. • Fixes to help ensure proper functionality when releasing the parking brake. • Improvements to brake performance in icy conditions. • Fixes to reduce noise while braking. • Fixes to help protect battery health. • Fixes to help ensure proper functionality for Adaptive Cruise Control. • Fixes for speed limit shown in driver display. • Improvements to the performance of Automatic Emergency Braking and Adaptive Cruise Control braking. • Fixes to help ensure proper functionality of Forward Collision Alert and availability of driver assistance features. • Fixes to help ensure proper functionality for liftgate. • Improvements to the performance of driver assistance features. • Fixes to help ensure accurate driver display messages and alerts.
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| 654.20 | Over-the-air update | Feb 27, 2026 | 11029900 | PDF, 196 KB |
| 654.20 | Over-the-air update | Feb 26, 2026 | 11029899 | PDF, 191 KB |
| 654.20 | Over-the-air update | Feb 19, 2026 | 11028980 | PDF, 197 KB |
| 654.20 | Over-the-air update | Feb 17, 2026 | 11028987 | PDF, 194 KB |
| 654.20 | Over-the-air update | Feb 9, 2026 | 11030384 | PDF, 200 KB |
| 654.20 | Over-the-air update | Feb 3, 2026 | 11028974 | PDF, 201 KB |
| 654.20 | Over-the-air update | Feb 3, 2026 | 11028970 | PDF, 201 KB |
| 654.20 | Over-the-air update | Feb 3, 2026 | 11028962 | PDF, 198 KB |
| 654.20 | Over-the-air update | Feb 3, 2026 | 11028952 | PDF, 199 KB |
| 654.20 | Over-the-air update | Jan 30, 2026 | 11028082 | PDF, 110 KB |
| 654.20 | Over-the-air update | Jan 30, 2026 | 11028056 | PDF, 114 KB |
| 654.20 | Over-the-air update | Jan 30, 2026 | 11027922 | PDF, 116 KB |
| 654.20 | Over-the-air update | Jan 16, 2026 | 11027917 | PDF, 109 KB |
| 654.20 | Over-the-air update | Jan 16, 2026 | 11027909 | PDF, 117 KB |
| 654.20 | Over-the-air update | Dec 19, 2025 | 11026854 | PDF, 98 KB |
| 654.20 | Over-the-air update | Dec 10, 2025 | 11026846 | PDF, 95 KB |
| 654.20 | Over-the-air update | Nov 25, 2025 | 11025930 | PDF, 98 KB |
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 15 model years
GMC 10 model years
Buick 3 model years
Cadillac 8 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 36 model years this bulletin names have filed 4,164 complaints with NHTSA since 2015.
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.
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, Buick and Cadillac, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is GM 654.20 a recall?
No. A over-the-air update 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 654.20 repair free?
A over-the-air update is usually paid by the manufacturer on the vehicles it names, within the terms and time limit the document sets; the dealer checks the VIN against the manufacturer’s list.
Which vehicles does 654.20 cover?
The manufacturer filed it against 36 model years across 4 brands (Chevrolet, GMC, Buick and Cadillac): 2026 Buick Enclave, 2025 Buick Enclave, 2024 Buick Envision, 2026 Cadillac Escalade, 2025 Cadillac Escalade, 2024 Cadillac Escalade and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.