GM over-the-air update CONNECTIVITY 2026.3
What it saysThis update contains a required software change to help improve the overall software update and diagnostics process. NHTSA’s full summary ↓
GM filed this with NHTSA as an over-the-air update dated Oct 31, 2026 — 2 documents under this number: Connectivity 2026.3 (2 filings). It names 10 model years across Chevrolet, Cadillac and Brightdrop (2024–2026). 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.
One page for every brand it was filed under. Each brand’s bulletins: Chevrolet · Cadillac · Brightdrop.
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 communicationThis update contains a required software change to help improve the overall software update and diagnostics process. Be sure to install this update to be able to receive future software updates. During the update process, your radio may stay on up to 5 minutes after you exit the vehicle. This is expected behavior.
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| Connectivity 2026.3 | Over-the-air update | Oct 31, 2026 | 11038822 | PDF, 196 KB |
| Connectivity 2026.3 | Over-the-air update | Oct 15, 2026 | 11038835 | PDF, 196 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 5 model years
Also filed against model years this site has no page for: 2025 Chevrolet Brightdrop 400; 2026 Chevrolet Brightdrop 400; 2025 Chevrolet Brightdrop 600; 2026 Chevrolet Brightdrop 600.
Cadillac 2 model years
Brightdrop 3 model years
Also filed against: 2024 Brightdrop 600 Elcv; 2024 Brightdrop Zevo 400; 2024 Brightdrop Zevo 600.
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 3 model years this bulletin names have filed 302 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, Cadillac and Brightdrop, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is GM CONNECTIVITY 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, or on its page here.
Is the CONNECTIVITY 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 CONNECTIVITY 2026.3 cover?
The manufacturer filed it against 10 model years across 3 brands (Chevrolet, Cadillac and Brightdrop): 2025 Cadillac Lyriq, 2024 Cadillac Lyriq, 2024 Chevrolet Equinox, 2024 Brightdrop 600 Elcv, 2024 Brightdrop Zevo 400, 2024 Brightdrop Zevo 600 and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.