GMC bulletin 661.10
GMC filed this with NHTSA as a over-the-air update dated Jun 9, 2026, received Feb 1, 2026, about the unknown or other — 12 documents under this number. It names 19 model years (2022–2026). 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 help reduce check engine light activation and emissions system messages • Improvements to reliability when extending the running boards on your vehicle • Fixes to help ensure proper functionality for heating and cooling features • Improvements to night mode lights for shifting gears • Fixes for Daytime Running Lamps turning on when set to Off • Fixes to help prevent erroneous missing key messages on driver display • Fixes for accuracy of low tire pressure alert • Fixes for speed threshold for pedestrian alerts • Improvements to active cabin ventilation • Additional protection for the health of your battery • Improvements to the software update system
Documents filed under this number
| Document | Kind | Dated | NHTSA id |
|---|---|---|---|
| 661.10 | Over-the-air update | Jun 9, 2026 | 11033772 |
| 661.10 | Over-the-air update | May 6, 2026 | 11032919 |
| 661.10 | Over-the-air update | Mar 28, 2026 | 11030533 |
| 661.10 | Over-the-air update | Mar 26, 2026 | 11030522 |
| 661.10 | Over-the-air update | Mar 21, 2026 | 11030539 |
| 661.10 | Over-the-air update | Mar 17, 2026 | 11030527 |
| 661.10 | Over-the-air update | Mar 17, 2026 | 11030525 |
| 661.10 | Over-the-air update | Mar 17, 2026 | 11030521 |
| 661.10 | Over-the-air update | Mar 5, 2026 | 11029901 |
| 661.10 | Over-the-air update | Feb 23, 2026 | 11030458 |
| 661.10 | Over-the-air update | Feb 14, 2026 | 11028978 |
| 661.10 | Over-the-air update | Jan 27, 2026 | 11027919 |
The summary is NHTSA’s abstract of the document, as filed under 49 CFR 579.5; the full text comes from the manufacturer or a dealer. 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. Quote it 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 661.10 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 661.10 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 661.10 cover?
The manufacturer filed it against 19 model years: 2026 GMC Acadia, 2025 GMC Acadia, 2024 GMC Acadia, 2026 GMC Canyon, 2025 GMC Canyon, 2024 GMC Canyon and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.