Chevrolet bulletin 24-NA-025
What it saysThis service bulletin provides repair information to correct a customer concern of Check Engine Light or Malfunction Indicator Lamp Illuminated with DTCs U0401 and/or U1611 Set. NHTSA’s full summary ↓
Chevrolet filed this with NHTSA as a service bulletin dated Jan 10, 2025, received Feb 14, 2024, about the electrical system — 7 documents under this number. It names 2 model years (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.
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What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationThis service bulletin provides repair information to correct a customer concern of Check Engine Light or Malfunction Indicator Lamp Illuminated with DTCs U0401 and/or U1611 Set.
Trouble codes it names: U0401 U1611
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| 24-NA-025 | Service bulletin | Jan 10, 2025 | 11013030 | PDF, 838 KB |
| 24-NA-025 | Service bulletin | Nov 21, 2024 | 11011957 | PDF, 838 KB |
| 24-NA-025 | Service bulletin | Oct 14, 2024 | 11010700 | PDF, 120 KB |
| 24-NA-025 | Service bulletin | Jun 29, 2024 | 11004879 | PDF, 135 KB |
| 24-NA-025 | Service bulletin | May 30, 2024 | 11001831 | PDF, 132 KB |
| 24-NA-025 | Service bulletin | Feb 7, 2024 | 10250511 | PDF, 91 KB |
| 24-NA-025 | Service bulletin | Jan 31, 2024 | 10250282 | PDF, 131 KB |
What the document itself lists
Labour operation and the time the manufacturer allows
| Operation | Description | Time |
|---|---|---|
| 2888088 | Reprogram ECM and TCM for U0401 and U1611 MIL and Check Engine Lamp | 0.9 hrs |
Read by machine from the document NHTSA serves (7 pages), read Sep 30, 2026. A part number is shown only where it matches Chevrolet’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 themA 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 2 model years this bulletin names have filed 33 complaints with NHTSA since 2015. 5 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.
I bought this car from a dealer .that buys buy back cars from Gm .when i bought the car the dealer stated all service have been done . well i took to get oil changed and chevy told me they had no record of this service.the 2024 corvette gets a free oil and trans service from chevy.it has got to be done before 7500 miles .well the dealer…
2024 Chevrolet Corvette · Power Train · filed with NHTSA Jun 23, 2026 · ODI 11745996
My Onstar feature does not work at all. So there is no emergency notification in the event of an accident. The dealer ordered the module to repair the problem but GM keeps canceling the order. There has been reports of the engine stalling, I have not experienced that yet so I do not drive the vehicle much for that reason
2025 Chevrolet Corvette · Electrical System · filed with NHTSA Oct 6, 2026 · ODI 11769313
Intermittent drivability issue involving the transmission during takeoff from a complete stop, most noticeable in heavy traffic and stop and go conditions. Vehicle shudders and lurches when accelerating from a dead stop, with a sensation similar to being hit from behind followed by abrupt engagement.
2025 Chevrolet Corvette · Engine · filed with NHTSA Feb 5, 2026 · ODI 11715879
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 group93 other manufacturer communications filed against the Chevrolet Corvette 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 |
|---|---|---|---|
| 18-NA-180 | Service bulletin | Sep 4, 2025 | This Warranty Administration service bulletin provides Lithium-Ion battery Exchange Process and Transaction Submission information. |
| 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… |
| 25-NA-098 | Service bulletin | Apr 18, 2025 | This Service Bulletin provides information on the latest Radio Software Z175 for vehicles equipped with RPO IOK related to improving radio r… |
| 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… |
| 25-NA-056 | Service bulletin | Apr 9, 2025 | This bulletin provides a procedure to replace the battery positive block cable to correct a customer concern of no start, multiple electrica… |
| 25-NA-087 | Service bulletin | Apr 3, 2025 | This service bulletin provides information on the proper Reflective High Temperature Heat and/or Insulating Tape to use for certain repairs… |
| 13-08-116-001K | Service bulletin | Mar 31, 2025 | The intent of this service bulletin is to identify aftermarket ALDL or DLC interface devices as potential sources for causing multiple custo… |
| 24-NA-098 | Service bulletin | Mar 21, 2025 | This service bulletin provides information for dealers/technicians on Service Programming System (SPS) Error Codes E4398, E4399, E4401, E440… |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Chevrolet, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is Chevrolet 24-NA-025 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-025 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 24-NA-025 cover?
The manufacturer filed it against 2 model years: 2025 Chevrolet Corvette, 2024 Chevrolet Corvette. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.