GM bulletin 25-NA-249
What it saysThis service bulletin provides the correction to the condition of the Malfunction Indicator Lamp being illuminated and/or the DTC P149E set. NHTSA’s full summary ↓
GM filed this with NHTSA as a service bulletin dated Sep 3, 2025, received Oct 21, 2025, about the electrical system. It names 4 model years across 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: Buick · Cadillac.
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What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationThis service bulletin provides the correction to the condition of the Malfunction Indicator Lamp being illuminated and/or the DTC P149E set.
Trouble codes it names: P149E
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| 25-NA-249 | Service bulletin | Sep 3, 2025 | 11024386 | PDF, 836 KB |
What the document itself lists
Labour operation and the time the manufacturer allows
| Operation | Description | Time |
|---|---|---|
| 4082688 | Reflash ECM | 0.3 hrs |
Read by machine from the document NHTSA serves (6 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 themBuick 2 model years
Cadillac 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 63 complaints with NHTSA since 2015. 35 of them name Electrical System, Engine — 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.
Same as in the other two complaints. At one year and approximately 5000 miles I personally did the first oil change. Car was approximately 3 quarts low on oil after draining the oil for the oil change. Filled up to manufacturers recommendation. Two months later and approximately 1000 miles on the car, the car was 1 quart low.
2024 Buick Envision · Engine · filed with NHTSA Apr 17, 2026
On XXX we were in the acceleration lane on XXX, merging onto the highway. When we engaged the cruise control the car rapidly accelerated up to 97 mph. We were unable to get car to slow down, or disengage the cruise for approximately 1 minute. The care ran for 97 mph for the minute or so this happened.
2025 Buick Envision · Electrical System · filed with NHTSA Aug 31, 2026
The contact owns a 2025 Cadillac XT4. The contact stated that the vehicle independently started after it was parked and turned off. The contact stated that the failure was intermittent but was a recurring failure. There was no warning light illuminated.
2025 Cadillac XT4 · Electrical System · filed with NHTSA Feb 2, 2026
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 group104 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 Buick list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| 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. |
| 22-NA-242 | Service bulletin | Apr 24, 2025 | This warranty administration bulletin provides information for dealers/technicians on System Reset and Connector Reconnect Labor Code Number… |
| 24-NA-113 | Service bulletin | Apr 23, 2025 | This service bulletin provides information for dealers/technicians on Vehicle Wide Programming Instructions. |
| 24-NA-229 | Service bulletin | Apr 10, 2025 | This bulletin provides a procedure on how to check for a battery drain utilizing the Picoscope and how to measure the load on the system tha… |
| 23-NA-222 | Service bulletin | Apr 8, 2025 | This service bulletin provides repair information to correct a customer concern of Radio Software issues and provide software… |
| 23-NA-160 | Service bulletin | Apr 8, 2025 | This service bulletin provides repair information to correct a customer concern of IVD Radio Software issues. |
| 24-NA-193 | Service bulletin | Apr 7, 2025 | This service bulletin provides repair information on software release Update W52E-176.1.2-M170-SQBR5-250.2 to correct customer concern of ra… |
| 24-NA-136 | Service bulletin | Apr 4, 2025 | This service bulletin provides repair information on new Radio Software Version is W38E-174.4.1-M170-SQBR5-180.5 to correct a customer conce… |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Buick and Cadillac, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is GM 25-NA-249 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 25-NA-249 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 25-NA-249 cover?
The manufacturer filed it against 4 model years across 2 brands (Buick and Cadillac): 2025 Buick Envision, 2024 Buick Envision, 2025 Cadillac XT4, 2024 Cadillac XT4. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.