GM bulletin 23-NA-145
What it saysThis service bulletin provides repair information to correct Radio Software issues with software update version 167.5. NHTSA’s full summary ↓
GM filed this with NHTSA as a service bulletin dated Nov 21, 2023, received Sep 15, 2023, about the equipment — 5 documents under this number. It names 4 model years across Chevrolet and Buick (2024). 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.
One page for every brand it was filed under. Each brand’s bulletins: Chevrolet · Buick.
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What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationWhat it applies to, as the document itself states it — the build window in the manufacturer’s own words, read by machine from the PDF NHTSA serves. The build date is on the certification label in the driver’s door jamb; the dealer settles a borderline vehicle by its VIN.
This service bulletin provides repair information to correct Radio Software issues with software update version 167.5.
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| 23-NA-145 | Service bulletin | Nov 21, 2023 | 10246479 | PDF, 112 KB |
| 23-NA-145 | Service bulletin | Oct 30, 2023 | 10245252 | PDF, 136 KB |
| 23-NA-145 | Service bulletin | Oct 19, 2023 | 10245233 | PDF, 135 KB |
| 23-NA-145 | Service bulletin | Sep 19, 2023 | 10244173 | PDF, 135 KB |
| 23-NA-145 | Service bulletin | Aug 18, 2023 | 10242253 | PDF, 134 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 themChevrolet 2 model years
Buick 2 model years
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 4 model years this bulletin names have filed 309 complaints with NHTSA since 2015. 134 of them name Electrical System, Back Over Prevention — the same broad component group this bulletin is filed under. NHTSA groups complaints coarsely, so that means the same area of the vehicle, not necessarily the same fault.
On the 2024 Chevrolet Trax, the 15 owners who gave an odometer reading for Electrical System reported it at a median of 16,400 miles. That figure is one model year’s, not the whole range this bulletin covers — medians from different model years are not averaged.
The instrument panel intermittently blacks out while driving. I have taken it back to the dealer twice and they are unable to reproduce the issue. The first time, they said it was a software issue and ran an update, but that did not fix the problem. I found online that this is a known issue so I contacted Buick Customer Care.
2024 Buick Envista · Electrical System · filed with NHTSA Apr 11, 2025 · ODI 11654216
The contact owns a 2024 Chevrolet Trax. The contact stated that while the vehicle was parked, the vehicle was remotely started erroneously. The vehicle was taken to the local dealer who determined that the infotainment system had been hacked. The infotainment center software was reloaded but the failure continued to occur.
2024 Chevrolet Trax · Electrical System · filed with NHTSA Mar 25, 2024 · ODI 11579261
The contact owns a 2024 Buick Encore GX. The contact stated that while reversing, the rear-view camera displayed a blurry image, and the rear-view camera later displayed a solid red image. The vehicle was taken to the dealer; however, the contact was informed that there were no issues with the rear-view camera image.
2024 Buick Encore · Back Over Prevention · filed with NHTSA Apr 10, 2026 · ODI 11730354
In depth: 2024 Chevrolet Trax electrical problems →
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 equipment
Source: same model, same component group57 other manufacturer communications filed against these GM models under the same component group (equipment), newest first. The eight newest are listed; the rest are on the Chevrolet list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| PIP5601B | Service bulletin | Jul 18, 2025 | This Preliminary Information communication provides information to the technician about vibration complaints that are one of the most challe… |
| 17-NA-073 | Service bulletin | Mar 5, 2025 | This warranty administration bulletin provides policy information with the field action courtesy transportation policy. |
| 17-NA-331 | Service bulletin | Jan 17, 2025 | Rear View Camera Guidelines Not Present at Times Condition Some customers may report that the Rear View Camera (RVC) guidelines are temp… |
| 22-NA-038 | Service bulletin | Dec 14, 2024 | This warranty bulletin provides information on Customer Concern Not Duplicated (CCND) Labor Operation Numbers. |
| 18-NA-263 | Service bulletin | Dec 14, 2024 | This warranty administration bulletin provides policy information for variable diagnostic time allowances on select labor operations… |
| 24-NA-040 | Service bulletin | Oct 11, 2024 | This service bulletin provides information on All hazmat parts being returned to the Warranty Parts Center (WPC) must be shipped using Centr… |
| 23-NA-154 | Service bulletin | Oct 2, 2024 | This bulletin provides information on Warranty Administration â Required Operating Procedures - 8 Points (U.S. Only). |
| 23-NA-219 | Service bulletin | Sep 21, 2024 | This service bulletin provides information on Concerns or Questions Regarding Installation of Dealer Installed Accessories. |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Chevrolet and Buick, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is GM 23-NA-145 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 23-NA-145 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. Every GM warranty extension on file lists the ones GM has filed.
Which vehicles does 23-NA-145 cover?
The manufacturer filed it against 4 model years across 2 brands (Chevrolet and Buick): 2024 Buick Encore, 2024 Buick Envista, 2024 Chevrolet Trailblazer, 2024 Chevrolet Trax. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone. The document itself sets the build window: 2024 SOP: built before 6 Jul 2023; built before 5 Jul 2023 — the build date is on the certification label in the driver’s door jamb.