Chevrolet over-the-air update ASSISTED DRIVING & CABIN 2026.3
What it saysImprovements to the availability of driver assistance features Your vehicle's battery will be better protected from overheating when charging Fixes to help ensure start reliability and prevent battery drain Improved… NHTSA’s full summary ↓
Chevrolet filed this with NHTSA as an over-the-air update dated Oct 29, 2026, received Nov 1, 2026 — 2 documents under this number: 663.40 (2 filings). It names 4 model years (2025–2026). 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.
What the bulletin says
Source: NHTSA's summary of the manufacturer's communication• Improvements to the availability of driver assistance features • Your vehicle's battery will be better protected from overheating when charging • Fixes to help ensure start reliability and prevent battery drain • Improved charging performance and messages • 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 braking when a vehicle is detected • Fixes to address erroneous braking • Improvements to vehicle acceleration response in heavy traffic • Improvements to braking responsiveness • Improvements to vehicle diagnostics • Fixes to preserve battery life and improve charging • Fixes to address issues with shifting • Fixes for vehicle airflow in icy conditions • Improvements to HVAC compressor performance
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| 663.40 | Over-the-air update | Oct 29, 2026 | 11038831 | PDF, 205 KB |
| 663.40 | Over-the-air update | Oct 29, 2026 | 11038830 | PDF, 205 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 themAlso filed against: 2025 Chevrolet Brightdrop 400; 2026 Chevrolet Brightdrop 400; 2025 Chevrolet Brightdrop 600; 2026 Chevrolet Brightdrop 600.
None of these model years has a page on this site (it covers EPA-certified cars, trucks and SUVs from 2016), so the bulletin is listed here on its own.
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Chevrolet, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is Chevrolet ASSISTED DRIVING & CABIN 2026.3 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.
Is the ASSISTED DRIVING & CABIN 2026.3 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 ASSISTED DRIVING & CABIN 2026.3 cover?
The manufacturer filed it against 4 model years: 2025 Chevrolet Brightdrop 400, 2026 Chevrolet Brightdrop 400, 2025 Chevrolet Brightdrop 600, 2026 Chevrolet Brightdrop 600. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.