GMC bulletin N25-F163BU
GMC filed this with NHTSA as a over-the-air update dated Oct 22, 2025, received Jul 31, 2025, about the unknown or other — 3 documents under this number. It names 6 model years (2023–2026). A 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 communicationGM Update N25-F163BU This 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 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-F163BU | Over-the-air update | Oct 22, 2025 | 11024641 | not yet checked |
| N25-F163BU | Over-the-air update | Aug 7, 2025 | 11022232 | not yet checked |
| N25-F163BU | Over-the-air update | Jul 26, 2025 | 11021069 | not yet checked |
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 themA vehicle page’s bulletin list shows the newest few communications filed against that model year; the count there is every one.
Common questions
Source: NHTSA, 49 CFR 579.5Is GMC N25-F163BU 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-F163BU 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-F163BU cover?
The manufacturer filed it against 6 model years: 2026 GMC Sierra, 2024 GMC Sierra, 2023 GMC Sierra, 2026 GMC Sierra 2500HD, 2025 GMC Sierra 2500HD, 2024 GMC Sierra 2500HD. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.