GM over-the-air update CABIN & DRIVING 2026.4
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 Oct 21, 2026, received Nov 1, 2026 — 2 documents under this number: Cabin & Driving 2026.4 (2 filings). It names 4 model years across Chevrolet and GMC (2023–2027). 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.
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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 • Improves transmission diagnostic software • Fixes for speed threshold for pedestrian alerts • Fixes a known iPhone 15 charging issue that affects some devices
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| Cabin & Driving 2026.4 | Over-the-air update | Oct 21, 2026 | 11038845 | PDF, 202 KB |
| Cabin & Driving 2026.4 | Over-the-air update | Oct 16, 2026 | 11038846 | PDF, 202 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 2 model years
GMC 2 model years
A vehicle page’s bulletin list shows the newest few communications filed against that model year; the count there is every one.
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What owners reported
Source: NHTSA complaint databaseOwners of the 4 model years this bulletin names have filed 202 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 and GMC, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is GM CABIN & DRIVING 2026.4 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 CABIN & DRIVING 2026.4 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 CABIN & DRIVING 2026.4 cover?
The manufacturer filed it against 4 model years across 2 brands (Chevrolet and GMC): 2023 Chevrolet Colorado, 2027 Chevrolet Equinox, 2023 GMC Canyon, 2027 GMC Terrain. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.