GM over-the-air update 662.10
What it saysFixes 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… NHTSA’s full summary ↓
GM filed this with NHTSA as an over-the-air update dated Sep 1, 2026, received Apr 30, 2026 — 21 documents under this number. It names 47 model years across Chevrolet, GMC, Buick and Cadillac (2021–2027). 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.
Get the next GM bulletin for your model by email Weekly, only when something new is filed. Nothing else; one-click unsubscribe.
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 • Fixes for speed threshold for pedestrian alerts • Improvements to start reliability and reduced check engine light activation • Improvements to turbo system diagnostics • Improvements to reliability when extending the running boards on your vehicle
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| 662.10 | Over-the-air update | Sep 1, 2026 | 11037762 | not found |
| 662.10 | Over-the-air update | Aug 13, 2026 | 11036485 | PDF, 187 KB |
| 662.10 | Over-the-air update | Aug 10, 2026 | 11036498 | PDF, 190 KB |
| 662.10 | Over-the-air update | Jul 23, 2026 | 11035345 | PDF, 188 KB |
| 662.10 | Over-the-air update | Jul 23, 2026 | 11035344 | PDF, 189 KB |
| 662.10 | Over-the-air update | Jul 16, 2026 | 11035431 | PDF, 186 KB |
| 662.10 | Over-the-air update | Jul 16, 2026 | 11035359 | PDF, 195 KB |
| 662.10 | Over-the-air update | Jul 16, 2026 | 11035291 | PDF, 192 KB |
| 662.10 | Over-the-air update | Jul 14, 2026 | 11035454 | PDF, 191 KB |
| 662.10 | Over-the-air update | Jul 14, 2026 | 11035425 | PDF, 192 KB |
| 662.10 | Over-the-air update | Jul 13, 2026 | 11035407 | PDF, 194 KB |
| 662.10 | Over-the-air update | Jul 10, 2026 | 11035455 | PDF, 192 KB |
| 662.10 | Over-the-air update | Jul 8, 2026 | 11036503 | PDF, 191 KB |
| 662.10 | Over-the-air update | Jul 7, 2026 | 11034067 | PDF, 190 KB |
| 662.10 | Over-the-air update | Jun 24, 2026 | 11034051 | PDF, 192 KB |
| 662.10 | Over-the-air update | Jun 23, 2026 | 11034072 | PDF, 184 KB |
| 662.10 | Over-the-air update | Jun 19, 2026 | 11034075 | PDF, 191 KB |
| 662.10 | Over-the-air update | Jun 17, 2026 | 11034935 | PDF, 191 KB |
| 662.10 | Over-the-air update | Jun 17, 2026 | 11034062 | PDF, 191 KB |
| 662.10 | Over-the-air update | May 28, 2026 | 11033003 | PDF, 195 KB |
| 662.10 | Over-the-air update | Apr 17, 2026 | 11031779 | PDF, 190 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 20 model years
GMC 15 model years
Also filed against model years this site has no page for: 2022 GMC Hummer EV Pickup.
Buick 3 model years
Cadillac 9 model years
and 1 more on this site: 2027 Cadillac Optiq.
A vehicle page’s bulletin list shows the newest few communications filed against that model year; the count there is every one.
Email me new GM bulletins for one of these models
A weekly email, sent only in a week when GM files something new with NHTSA for the model you pick — service bulletins, campaigns, warranty extensions, over-the-air notices, every model year. Nothing else is sent; one-click unsubscribe in every message. Separate from recall alerts.
What owners reported
Source: NHTSA complaint databaseOwners of the 46 model years this bulletin names have filed 5,109 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 662.10 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 662.10 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 662.10 cover?
The manufacturer filed it against 47 model years across 4 brands (Chevrolet, GMC, Buick and Cadillac): 2026 Buick Enclave, 2025 Buick Encore, 2024 Buick Encore, 2024 Cadillac CT4, 2024 Cadillac CT5, 2026 Cadillac Escalade and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.