GM bulletin 24-NA-193
What it saysThis service bulletin provides repair information on software release Update W52E-176.1.2-M170-SQBR5-250.2 to correct customer concern of radio software issues. NHTSA’s full summary ↓
GM filed this with NHTSA as a service bulletin dated Apr 7, 2025, received Nov 12, 2024, about the electrical system — 6 documents under this number. It names 13 model years across Chevrolet, GMC, Buick and Cadillac (2024–2025). 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 on software release Update W52E-176.1.2-M170-SQBR5-250.2 to correct customer concern of radio software issues.
Trouble codes it names: U13F9 U223B all 2 read from the document itself; NHTSA’s summary names none
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| 24-NA-193 | Service bulletin | Apr 7, 2025 | 11019013 | PDF, 843 KB |
| 24-NA-193 | Service bulletin | Feb 7, 2025 | 11014283 | PDF, 843 KB |
| 24-NA-193 | Service bulletin | Jan 29, 2025 | 11014083 | PDF, 843 KB |
| 24-NA-193 | Service bulletin | Dec 16, 2024 | 11012889 | PDF, 843 KB |
| 24-NA-193 | Service bulletin | Nov 27, 2024 | 11012002 | PDF, 843 KB |
| 24-NA-193 | Service bulletin | Oct 4, 2024 | 11010461 | PDF, 843 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.
Model years it names
Source: as the manufacturer filed themChevrolet 5 model years
GMC 3 model years
Buick 2 model years
Cadillac 3 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 13 model years this bulletin names have filed 1,990 complaints with NHTSA since 2015. 365 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.
While in traffic over 45 miles per hour, the vehicle placed itself into a hazard mode due to the electric vehicle propulsion system. This happened so fast and the deceleration rate was so quick that it risked a rear end collision. This is the second time this has happened and both were following a heavy rain storm.
2024 Chevrolet Silverado · Electrical System · filed with NHTSA Jul 19, 2025
The contact owns a 2024 GMC Acadia. The contact stated that while driving at an undisclosed speed, the infotainment touch screen failed to display pertinent vehicle safety information. After restarting the vehicle, the vehicle returned to normal functionality, but the failure became a regular occurrence.
2024 GMC Acadia · Electrical System · filed with NHTSA Jun 10, 2025
Component Malfunction and Availability for Inspection: The vehicle’s infotainment system is critically malfunctioning and poses a serious safety threat. The issue has persisted despite four service attempts, and GM refuses to repair it. The vehicle is available for inspection upon request.
2024 Chevrolet Equinox · Electrical System · filed with NHTSA Apr 5, 2025
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 group410 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 |
|---|---|---|---|
| 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… |
| N252515590 | Service campaign | Jan 27, 2026 | Certain vehicles listed above, may have a condition in which the body-to-chassis ground strap may be corroded. Dealers will replace the grou… |
| 24-NA-166 | Service bulletin | Nov 7, 2025 | This technical bulletin provides repair information to correct a customer concern of DTC C1171 C1172 C1173 C1174 Tire Pressure Monitor Senso… |
| 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. |
| 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… |
| 24-NA-272 | Service bulletin | Jun 5, 2025 | This technical bulletin provides repair information to correct a customer concern of Park Assist False Alerts on Z71 Traverse. |
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 24-NA-193 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 24-NA-193 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 24-NA-193 cover?
The manufacturer filed it against 13 model years across 4 brands (Chevrolet, GMC, Buick and Cadillac): 2025 Buick Enclave, 2024 Buick Envision, 2025 Cadillac CT5, 2024 Cadillac Lyriq, 2024 Cadillac XT4, 2024 Chevrolet Colorado and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.