GM bulletin 23-NA-108
What it saysThis service bulletin provides repair information to dealers to Replace Video Processing Module (VPM) When Programming Fails. NHTSA’s full summary ↓
GM filed this with NHTSA as a service bulletin dated Jun 16, 2023, received Jul 11, 2023, about the electrical system. It names 28 model years across Chevrolet, GMC, Buick and Cadillac (2019–2023). 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 dealers to Replace Video Processing Module (VPM) When Programming Fails.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| 23-NA-108 | Service bulletin | Jun 16, 2023 | 10239057 | PDF, 147 KB |
What the document itself lists
The manufacturer titles it “Replace Video Processing Module (VPM) When Programming Fails”.
Labour operation and the time the manufacturer allows
| Operation | Description | Time |
|---|---|---|
| 3487888 | Replace K157 Video Processing Control Module for Programming Errors | 1.9 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.
Model years it names
Source: as the manufacturer filed themChevrolet 8 model years
Buick 4 model years
Cadillac 11 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 28 model years this bulletin names have filed 3,985 complaints with NHTSA since 2015. 536 of them name Electrical System — 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.
Started vehicle in morning and no sound from the infotainment system (even if radio screen is on). Noticed turn indicators sound no longer functioned as well as I believe auto stop function also became non-functional. Safety concern while driving. Had to reset by performing a system re-set/re-boot myself to make everything work again.
2023 Cadillac XT4 · Electrical System · filed with NHTSA Mar 1, 2026 · ODI 11721284
Took dealer 3/26 for Sam issue Engine Power reduced after already cause me hit curb. Got it out 4/1/26 Now 4/5/26 it happened again same codes after they claimed they fixed it. Also keep having Emergency services come on a caused my dashboard out. My issues is car keeps stalling losing power. Same codes as week ago after dealer fix.
2023 GMC Terrain · Electrical System · filed with NHTSA Apr 5, 2026 · ODI 11729297
The contact owns a 2022 Buick Envision. The contact stated that while driving approximately 35 MPH, the instrument panel went black and the speedometer, direction light, gear, fuel gauge, and temperature gauge were not visible. The vehicle was taken to a dealer where it was diagnosed that the instrument panel needed to be replaced.
2022 Buick Envision · Electrical System · filed with NHTSA Aug 19, 2026 · ODI 11757902
In depth: 2021 Chevrolet Tahoe electrical problems → · 2023 GMC Yukon electrical problems → · 2022 GMC Yukon 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 electrical system
Source: same model, same component group282 other manufacturer communications filed against these GM models under the same component group (electrical system), newest first. The eight newest are listed; the rest are on the Chevrolet list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| N262565450 | Service campaign | Oct 26, 2026 | Customer Satisfaction Program. Certain vehicles listed above may have a condition in which remanufactured high voltage battery packs were b… |
| N252529080 | Service campaign | Apr 1, 2026 | Service Update. Certain vehicles listed above may be missing a high voltage header plug on the RESS battery pack drive motor connector. Dea… |
| 24-NA-227 | Service bulletin | Nov 4, 2025 | This technical bulletin provides repair information to correct a customer concern of Vibration Rattle or Boom at 1800 to 2000 RPM. |
| 25-NA-061 | Service bulletin | Oct 3, 2025 | This technical bulletin provides a procedure to correct the condition of Driver or Passenger Rear Door Handle Will Not Fold In. |
| 18-NA-180 | Service bulletin | Sep 4, 2025 | This Warranty Administration service bulletin provides Lithium-Ion battery Exchange Process and Transaction Submission information. |
| 25-NA-021 | Service bulletin | Jun 7, 2025 | This technical bulletin provides repair information to correct a customer concern of Radio Software Update W23E-178.1.2-M174-SQBR6-93.3. |
| PIE0829A | Service bulletin | Jun 5, 2025 | This engineering information (EI) closure ends the need for gathering further information from technicians in regard to the liftgate not ope… |
| 25-NA-153 | Service bulletin | Jun 5, 2025 | This informational bulletin provides Information on Rear Upper Body Structure Auxiliary Lamp Will Not Turn ON. |
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-108 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-108 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-108 cover?
The manufacturer filed it against 28 model years across 4 brands (Chevrolet, GMC, Buick and Cadillac): 2023 Buick Envision, 2022 Buick Envision, 2021 Buick Envision, 2020 Buick Envision, 2021 Cadillac CT5, 2020 Cadillac CT5 and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.