Chevrolet bulletin 661.10
Chevrolet filed this with NHTSA as a over-the-air update dated Jun 9, 2026, received Feb 1, 2026, about the unknown or other — 17 documents under this number. It names 25 model years (2022–2027). 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• 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. • 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 accurate driver display messages and alerts. • Improvements to the performance of One-Pedal Driving • Improvements to propulsion and acceleration. • Improves the performance of assisted braking features.
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| 661.10 | Over-the-air update | Jun 9, 2026 | 11033772 | not yet checked |
| 661.10 | Over-the-air update | May 6, 2026 | 11032919 | not yet checked |
| 661.10 | Over-the-air update | Apr 22, 2026 | 11031770 | not yet checked |
| 661.10 | Over-the-air update | Apr 16, 2026 | 11031775 | not yet checked |
| 661.10 | Over-the-air update | Apr 15, 2026 | 11031771 | not yet checked |
| 661.10 | Over-the-air update | Apr 14, 2026 | 11031777 | not yet checked |
| 661.10 | Over-the-air update | Apr 8, 2026 | 11031772 | not yet checked |
| 661.10 | Over-the-air update | Mar 31, 2026 | 11031128 | not yet checked |
| 661.10 | Over-the-air update | Mar 28, 2026 | 11030533 | not yet checked |
| 661.10 | Over-the-air update | Mar 26, 2026 | 11030522 | not yet checked |
| 661.10 | Over-the-air update | Mar 21, 2026 | 11030539 | not yet checked |
| 661.10 | Over-the-air update | Mar 17, 2026 | 11030527 | not yet checked |
| 661.10 | Over-the-air update | Mar 17, 2026 | 11030525 | not yet checked |
| 661.10 | Over-the-air update | Mar 17, 2026 | 11030521 | not yet checked |
| 661.10 | Over-the-air update | Mar 5, 2026 | 11029901 | not yet checked |
| 661.10 | Over-the-air update | Feb 14, 2026 | 11028978 | not yet checked |
| 661.10 | Over-the-air update | Jan 27, 2026 | 11027919 | not yet checked |
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 themA 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 Chevrolet 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 25 model years: 2026 Chevrolet Blazer, 2025 Chevrolet Blazer, 2024 Chevrolet Blazer, 2027 Chevrolet Bolt, 2026 Chevrolet Colorado, 2025 Chevrolet Colorado and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.