GM service campaign A242435780-01
What it saysCertain vehicles may have The engine control module may not properly control engine ignition timing following certain Auto Engine Stop/Start events. NHTSA’s full summary ↓
GM filed this with NHTSA as a service campaign dated Aug 15, 2024. It names 4 model years across Chevrolet and Buick (2024). A service campaign is not a safety recall — there is no NHTSA campaign number and no federal requirement — but it is usually work the manufacturer pays for on the vehicles it names; the dealer checks the VIN against the manufacturer’s list.
One page for every brand it was filed under. Each brand’s bulletins: Chevrolet · Buick.
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What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationPicked out of NHTSA’s summary below, word for word. The document itself is the record, and the dealer checks the VIN.
Emission Recall - certain vehicles may have The engine control module may not properly control engine ignition timing following certain Auto Engine Stop/Start events. If this were to occur, the Malfunction Indicator Lamp (Check Engine Light) would illuminate, and the engine may run rough or knock. In some cases, if the vehicle is driven with engine knock, engine damage could occur. Proper engine ignition timing control will resume following a subsequent Auto Engine Stop/Start event. This is a voluntary Emission Recall. Dealers are to reprogram the Engine Control Module..
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| A242435780-01 | Service campaign | Aug 15, 2024 | 11006392 | PDF, 478 KB |
What the document itself lists
The manufacturer titles it “REVISION: A242435780-01 – Emission Recall”.
Labour operations and the time the manufacturer allows
| Operation | Description | Time |
|---|---|---|
| 9107335 | Verified Module Software or Calibration Level: Module Is Programmed with Same Level… | 0.2 hrs |
| 9107336 | Engine Control Module Reprogramming with SPS | 0.3 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.
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 2 model years
Buick 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 309 complaints with NHTSA since 2015.
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.
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Chevrolet and Buick, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is GM A242435780-01 a recall?
No. A service campaign 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 A242435780-01 repair free?
A service campaign is usually paid by the manufacturer on the vehicles it names, within the terms and time limit the document sets; the dealer checks the VIN against the manufacturer’s list.
Which vehicles does A242435780-01 cover?
The manufacturer filed it against 4 model years across 2 brands (Chevrolet and Buick): 2024 Buick Encore, 2024 Buick Envista, 2024 Chevrolet Trailblazer, 2024 Chevrolet Trax. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.