GMC bulletin N23-240448
What it says'(There may be future updates under this same release number.) Your GMC Hummer EV keeps getting better. NHTSA’s full summary ↓
GMC filed this with NHTSA as a service bulletin dated Aug 15, 2023, received Aug 14, 2023, about the back over prevention — 2 documents under this number. It names 1 model year (2023). A service bulletin is not a safety recall: it is the manufacturer telling its dealers how to diagnose or repair a condition, and whether the work is paid for depends on the warranty in force. Quoting the number at a service desk can save a diagnosis.
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What the bulletin says
Source: NHTSA's summary of the manufacturer's communication'(There may be future updates under this same release number.) Your GMC Hummer EV keeps getting better. This software update includes the following if your vehicle is equipped: Refinements: â¢Updates made to the long range radar functionality to enhance alignment during height changes when parking. â¢Updates made to the horn functionality during towing for a more intuitive and user-friendly operation. â¢Updates made to improve connectivity within Apple Carplay, Bluetooth & SiriusXM. â¢Updates made to the gearshift functionality to provide a smoother experience while shifting gears. â¢Updates made to the Super Cruise driver assistance technology and the Adaptive Cruise Control functionality for an improved performance and smoother driving experience. â¢A variety of other minor software updates to make your driving and in-vehicle experience better. Better Never Stopsâ¢
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| N23-240448 | Service bulletin | Aug 15, 2023 | 10241208 | PDF, 93 KB |
| N23-240448 | Service bulletin | Aug 9, 2023 | 10240714 | PDF, 96 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.
Doing the repair yourself, or pricing it before the shop does? Search the part by fitment on eBay Motors — the listing and the price are the seller’s.
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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.
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What owners reported
Source: NHTSA complaint databaseOwners of the 1 model year this bulletin names have filed 1 complaint 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.
More bulletins about the back over prevention
Source: same model, same component group6 other manufacturer communications filed against the GMC Hummer EV under the same component group (back over prevention), newest first.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| PIT6139 | Service bulletin | Mar 21, 2024 | This Preliminary information communicates to the field on how to clear the Service Drivers Assist message with new software that is now avai… |
| PIT6044F | Service bulletin | Dec 1, 2023 | This Preliminary information communicates that a Software update is in the works and to disconnect the 12 volt battery to clear the codes. |
| PIT6044E | Service bulletin | Oct 30, 2023 | This Preliminary information communicates that a Software update is in the works and to disconnect the 12 volt battery to clear the codes. |
| PIT6044A | Service bulletin | Aug 9, 2023 | This Preliminary information communicates that a Software update is in the works and to disconnect the 12 volt battery to clear the codes. |
| PIT6044 | Service bulletin | Aug 3, 2023 | This Preliminary information communicates that a Software update is in the works and to disconnect the 12 volt battery to clear the codes. |
| PIT5832H | Service bulletin | May 11, 2023 | This Preliminary information communicates a diagnostic tip on how to resolve a issue if the serial data authentication configuration did not… |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for GMC, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is GMC N23-240448 a recall?
No. A service bulletin 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 N23-240448 repair free?
Not automatically. A service bulletin describes how to diagnose or repair a condition; who pays depends on the warranty in force, any extension, and the dealer. Quoting the number can save a diagnosis either way.
Which vehicles does N23-240448 cover?
The manufacturer filed it against 1 model year: 2023 GMC Hummer EV. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.