GMC bulletin 661.30
GMC filed this with NHTSA as a over-the-air update dated Jun 18, 2026, received Apr 2, 2026, about the unknown or other — 9 documents under this number. It names 9 model years (2023–2026). 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 the performance of Bose AudioPilot to better counteract road and ambient noise. • Your towing experience is improving by preventing enablement of King Crab mode when a trailer is attached. • When towing a trailer, you will now experience less trailer sway. • This update will help prevent One-Pedal Driving from deactivating after you remote start your vehicle. • Fixes to help ensure proper functionality for Brake Assist. • Fixes to help ensure successful vehicle software updates. • Improvements to performance for under-hood storage opening • Fixes to help ensure the swing gate opens and closes properly. • Fixes to help ensure proper functionality of Forward Collision Alert and availability of driver assistance features.
Documents filed under this number
| Document | Kind | Dated | NHTSA id |
|---|---|---|---|
| 661.30 | Over-the-air update | Jun 18, 2026 | 11034082 |
| 661.30 | Over-the-air update | May 26, 2026 | 11032931 |
| 661.30 | Over-the-air update | May 7, 2026 | 11032921 |
| 661.30 | Over-the-air update | Apr 23, 2026 | 11031829 |
| 661.30 | Over-the-air update | Apr 14, 2026 | 11031807 |
| 661.30 | Over-the-air update | Apr 1, 2026 | 11031766 |
| 661.30 | Over-the-air update | Mar 21, 2026 | 11030542 |
| 661.30 | Over-the-air update | Mar 21, 2026 | 11030541 |
| 661.30 | Over-the-air update | Mar 21, 2026 | 11030540 |
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 661.30 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 661.30 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 661.30 cover?
The manufacturer filed it against 9 model years: 2026 GMC Sierra, 2025 GMC Sierra, 2024 GMC Sierra, 2023 GMC Sierra, 2025 GMC Terrain, 2026 GMC Yukon and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.