GM bulletin 23-NA-042
What it saysThis service bulletin provides repair information to update radio software to correct customer concerns of Software related issues. NHTSA’s full summary ↓
GM filed this with NHTSA as a service bulletin dated Jun 28, 2023, received Apr 12, 2023, about the equipment — 3 documents under this number. It names 73 model years across Chevrolet, GMC, Buick and Cadillac (2021–2023). 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.
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 communicationThis service bulletin provides repair information to update radio software to correct customer concerns of Software related issues.
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| 23-NA-042 | Service bulletin | Jun 28, 2023 | 10239115 | PDF, 155 KB |
| 23-NA-042 | Service bulletin | Apr 4, 2023 | 10235402 | PDF, 138 KB |
| 23-NA-042 | Service bulletin | Mar 15, 2023 | 10234117 | PDF, 138 KB |
What the document itself lists
The manufacturer titles it “Radio Software Version V164 Update”.
Labour operation and the time the manufacturer allows
| Operation | Description | Time |
|---|---|---|
| 2889368 | Radio Reprogramming with SPS/USB to V164 Update | 0.6 hrs |
Read by machine from the document NHTSA serves (8 pages), read Sep 30, 2026. A part number is shown only where it matches GM’s own catalogue shape, an operation only with its code and time, and a description only where the reader got it whole; anything it could not settle is left out, and the PDF is the record. Times are the manufacturer’s warranty allowances, not a quote. Listings and prices on eBay Motors are the seller’s.
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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.
Find the software for the 2023 Blazer →Affiliate disclosure: some links on this page are affiliate links. If you request a quote or buy through them we may earn a commission at no extra cost to you. Nothing on this page changes because of it.
Model years it names
Source: as the manufacturer filed themChevrolet 34 model years
GMC 15 model years
and 7 more on this site: 2021 GMC Sierra 2500HD, 2023 GMC Sierra 3500HD, 2022 GMC Sierra 3500HD, 2021 GMC Sierra 3500HD, 2023 GMC Terrain, 2022 GMC Terrain, 2021 GMC Yukon.
Buick 8 model years
Cadillac 16 model years
and 7 more on this site: 2021 Cadillac XT4, 2023 Cadillac XT5, 2022 Cadillac XT5, 2021 Cadillac XT5, 2023 Cadillac XT6, 2022 Cadillac XT6, 2021 Cadillac XT6.
Also filed against model years this site has no page for: 2021 Cadillac CT6.
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 72 model years this bulletin names have filed 7,970 complaints with NHTSA since 2015. 1,408 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 2021 GMC Sierra, the 17 owners who gave an odometer reading for Electrical System reported it at a median of 23,300 miles. That figure is one model year’s, not the whole range this bulletin covers — medians from different model years are not averaged.
I cannot believe the Corvette does not show that the alternator does not show that the car is not charging. I have a thirty year old corvette that will show you when the alternator does not show the car has an under performing alternator. If you do not have it showing on the display it will not show you that the alternator is defective.
2021 Chevrolet Corvette · Electrical System · filed with NHTSA May 3, 2025 · ODI 11658701
On September 15,2026, my vehicle experienced a catastrophic los of power steering assist accompanied by severe heavy steering. Please review General Motors TSB 20-NA-215 & TSB 17-NA-158 both addressing this issue. My 2021 vehicle has a build date of September 19, 2020 which falls "directly" in the time frame covered by these bulletins.
2021 Cadillac XT6 · Electrical System · filed with NHTSA Oct 11, 2026 · ODI 11770401
MY 2023 CHEVY MALIBU HAS A MISSING TURBOCHARGER SCREW THAT RANDOMLY CAME OFF FROM UNDER A METAL PLATE ON ITS OWN, GMC HAS A RECALL ON 2022 -2023 CHEY MALIBU WITH TURBO CHARGER ISSUES BUT THEY WONT COVER MINES BECAUSE IT DIDNT COME FROM A CERTIAN FACTORY ALTHOUGH THEY KNOW A HELL OF ALOT OF CHEVY MALIBU OWNERS HAVE TURBO CHARGER ISSUES…
2023 Chevrolet Malibu · Electrical System · filed with NHTSA Feb 11, 2026 · ODI 11717268
In depth: 2023 Chevrolet Silverado electrical problems → · 2022 Chevrolet Silverado electrical problems → · 2021 Chevrolet Silverado electrical problems → · 2021 Chevrolet Tahoe 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 group201 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 |
|---|---|---|---|
| PIT6504 | Service bulletin | Apr 1, 2026 | This preliminary information communicates a normal characteristic where Some customers may comment that they have a " Forward Collision Unav… |
| 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… |
| 22-NA-161 | Service bulletin | May 17, 2025 | This informational bulletin provides information for dealers/technicians on power folding mirrors do not fold at the same speed. |
| 20-NA-051 | Service bulletin | Apr 30, 2025 | This informational bulletin provides information on the Low Cab Forward trucks and the Alpine Radio Exchange Program. |
| 22-NA-096 | Service bulletin | Mar 29, 2025 | This informational bulletin provides information for dealers/technicians on Customer Education Bulletin for Google Built In Radio. |
| 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… |
| 21-NA-091 | Service bulletin | Dec 21, 2024 | This service bulletin provides information for customers/dealers/technicians on Normal Camera Display Operation - Flashing Diamond - Spot… |
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 23-NA-042 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-042 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-042 cover?
The manufacturer filed it against 73 model years across 4 brands (Chevrolet, GMC, Buick and Cadillac): 2023 Buick Enclave, 2022 Buick Enclave, 2023 Buick Encore, 2022 Buick Encore, 2021 Buick Encore, 2023 Buick Envision and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.