GM over-the-air update N25-250552
What it saysGM Update N25-250552 Improvements to OnStar through enhancements for charging, Super Cruise, remote start, and collision notification. NHTSA’s full summary ↓
GM filed this with NHTSA as an over-the-air update dated May 12, 2026, received Jul 31, 2025 — 6 documents under this number. It names 81 model years across Chevrolet, GMC, Buick and Cadillac (2021–2026). 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 · GMC · Buick · Cadillac.
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What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationGM Update N25-250552 • Improvements to OnStar through enhancements for charging, Super Cruise, remote start, and collision notification. • Fixes to address connectivity issues. During the update process, your radio may stay on up to 5 minutes after you exit the vehicle. This is expected behavior when an update package is onboard the vehicle. Do not service your vehicle during installation.
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| N25-250552 | Over-the-air update | May 12, 2026 | 11032925 | PDF, 182 KB |
| N25-250552 | Over-the-air update | Mar 21, 2026 | 11030532 | PDF, 191 KB |
| N25-250552 | Over-the-air update | Feb 5, 2026 | 11028977 | PDF, 191 KB |
| N25-250552 | Over-the-air update | Dec 3, 2025 | 11026842 | PDF, 99 KB |
| N25-250552 | Over-the-air update | Aug 7, 2025 | 11022233 | PDF, 91 KB |
| N25-250552 | Over-the-air update | Jul 26, 2025 | 11021070 | PDF, 90 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 41 model years
and 1 more on this site: 2024 Chevrolet Trax.
GMC 15 model years
and 7 more on this site: 2023 GMC Sierra 2500HD, 2022 GMC Sierra 2500HD, 2021 GMC Sierra 2500HD, 2024 GMC Terrain, 2023 GMC Terrain, 2022 GMC Terrain, 2021 GMC Terrain.
Buick 12 model years
and 4 more on this site: 2022 Buick Encore, 2021 Buick Encore, 2025 Buick Envista, 2024 Buick Envista.
Cadillac 13 model years
and 5 more on this site: 2025 Cadillac XT6, 2024 Cadillac XT6, 2023 Cadillac XT6, 2022 Cadillac XT6, 2021 Cadillac XT6.
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 81 model years this bulletin names have filed 8,692 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 N25-250552 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 N25-250552 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 N25-250552 cover?
The manufacturer filed it against 81 model years across 4 brands (Chevrolet, GMC, Buick and Cadillac): 2024 Buick Enclave, 2023 Buick Enclave, 2022 Buick Enclave, 2021 Buick Enclave, 2026 Buick Encore, 2025 Buick Encore and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.