GMC bulletin 662.30
GMC filed this with NHTSA as a over-the-air update dated Aug 19, 2026, received Jun 26, 2026, about the unknown or other — 12 documents under this number. It names 12 model years (2024–2026). A 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.
What the bulletin says
Source: NHTSA's summary of the manufacturer's communication• Improvements to system responsiveness • Improvements to camera image clarity • Fixes to prevent blank screens and audio drop-outs • Improvements to vehicle software update installation • Additional protection for battery health and to help prevent battery drain • Improved charging messaging in the driver display • Improved vehicle diagnostics • Improved vehicle performance when driving in Reverse on slippery surfaces • Better One-Pedal Driving performance • Additional protection for battery health and prevention for battery drain • Improved accuracy for driver display message • Updates to allow drive mode selection from the center display
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| 662.30 | Over-the-air update | Aug 19, 2026 | 11036468 | PDF, 187 KB |
| 662.30 | Over-the-air update | Jul 21, 2026 | 11035453 | PDF, 198 KB |
| 662.30 | Over-the-air update | Jul 20, 2026 | 11035389 | PDF, 196 KB |
| 662.30 | Over-the-air update | Jul 16, 2026 | 11035294 | PDF, 188 KB |
| 662.30 | Over-the-air update | Jul 15, 2026 | 11036500 | PDF, 195 KB |
| 662.30 | Over-the-air update | Jul 15, 2026 | 11035387 | PDF, 196 KB |
| 662.30 | Over-the-air update | Jul 15, 2026 | 11035386 | PDF, 195 KB |
| 662.30 | Over-the-air update | Jul 14, 2026 | 11035426 | PDF, 193 KB |
| 662.30 | Over-the-air update | Jul 14, 2026 | 11035424 | PDF, 193 KB |
| 662.30 | Over-the-air update | Jul 13, 2026 | 11036502 | PDF, 204 KB |
| 662.30 | Over-the-air update | Jun 22, 2026 | 11034936 | PDF, 190 KB |
| 662.30 | Over-the-air update | Jun 7, 2026 | 11034080 | PDF, 189 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 themAlso filed against model years this site has no page for: 2026 GMC Hummer EV Pickup; 2026 GMC Hummer EV SUV.
A vehicle page’s bulletin list shows the newest few communications filed against that model year; the count there is every one.
Common questions
Source: NHTSA, 49 CFR 579.5Is GMC 662.30 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 662.30 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 662.30 cover?
The manufacturer filed it against 12 model years: 2025 GMC Acadia, 2024 GMC Acadia, 2025 GMC Hummer EV, 2024 GMC Hummer EV, 2026 GMC Sierra, 2025 GMC Sierra and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.