GM service campaign N242484740
What it saysCertain vehicles may have a condition that could cause the evaporative emissions purge pump to fail. NHTSA’s full summary ↓
GM filed this with NHTSA as a service campaign dated Jan 14, 2025, about the engine. It names 20 model years across Chevrolet, GMC, Buick and Cadillac (2022–2023). 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 · GMC · Buick · Cadillac.
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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.
Special Coverage - Certain vehicles may have a condition that could cause the evaporative emissions purge pump to fail. If this condition occurs, the Malfunction Indicator Lamp (Check Engine Light) will illuminate, and a diagnostic trouble code will set. Dealers are to replace the Evaporative Emissions Purge Pump as necessary. The repairs will be made at no charge to the customer.
Trouble codes it names: P0146 P1467 P1469 P146A P146B P146C P146D P146E P146F P148E P148F P1490 P14A4 all 13 read from the document itself; NHTSA’s summary names none
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| N242484740 | Service campaign | Jan 14, 2025 | 11012848 | PDF, 179 KB |
What the document itself lists
The manufacturer titles it “N242484740 - Special Coverage”.
Parts the bulletin names
| Part number | Description | Qty |
|---|---|---|
| 12741165 | Evaporative Emissions Canister Purge Pump | — |
| 12741163 | — | — |
| 25207556 | — | — |
| 12726033 | — | — |
Labour operations and the time the manufacturer allows
| Operation | Description | Time |
|---|---|---|
| 9900913 | Evaporative Emission Canister Purge Pump Replacement Acadia, XT5, XT6 Blazer Encore… | 0.3 hrs |
| 9900915 | Customer Reimbursement Denied – For USA dealers only N/A ZREG ** For USA and Canada… | 20 hrs |
Read by machine from the document NHTSA serves (4 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 4 model years
GMC 3 model years
Buick 3 model years
Cadillac 10 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 20 model years this bulletin names have filed 1,665 complaints with NHTSA since 2015. 648 of them name 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.
On the 2022 GMC Sierra, the 54 owners who gave an odometer reading for Engine reported it at a median of 47,000 miles. That figure is one model year’s, not the whole range this bulletin covers — medians from different model years are not averaged.
i FEEL IT IS IN THE FUEL MANAGEMENT SYSTEM When driving along every now and then you can feel a vibration like diving on rumble strips. there is no rhyme or reason for it. I had it to the dealer and they told me that was normal, if you don't want it to do it then drive in 9th gear. I'm not going to shift to 9th every time I drive
2022 GMC Sierra · Engine · filed with NHTSA Jan 3, 2023 · ODI 11499958
The contact owns a 2022 Cadillac XT4. The contact stated that while driving at an undisclosed speed, the vehicle was shaking and lost motive power. The messages "Service Stabili-trak" and "Intake and Exhaust Valve To Optimize Performance And Efficiency, Please Schedule Service Now" were displayed. The vehicle failed to restart.
2022 Cadillac XT4 · Engine · filed with NHTSA Aug 3, 2026 · ODI 11754449
The contact owns a 2022 GMC Acadia. The contact stated while driving at an undisclosed speed, the vehicle lost motive power and the stability track warning light illuminated. The contact stated that when the accelerator pedal was depressed, the contact stated that an unknown fluid was shooting out onto the contact's foot.
2022 GMC Acadia · Engine · filed with NHTSA Aug 1, 2024 · ODI 11605882
In depth: 2022 Chevrolet Silverado engine problems → · 2022 GMC Sierra engine 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 engine
Source: same model, same component group277 other manufacturer communications filed against these GM models under the same component group (engine), newest first. The eight newest are listed; the rest are on the Chevrolet list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| N262570770-03 | Service campaign | Oct 16, 2026 | Certain vehicles may have a condition in which the thermal break tabs induce stress into the radiator causing a coolant leak. Dealers are t… |
| N262576260 | Service campaign | Oct 15, 2026 | General Motors has decided to conduct a Voluntary Emission Recall. Certain vehicles may have a condition that could cause a small exhaust le… |
| N262570770-02 | Service campaign | Sep 25, 2026 | Certain vehicles may have a condition in which the thermal break tabs induce stress into the radiator causing a coolant leak. Dealers are to… |
| N262570770-01 | Service campaign | Sep 18, 2026 | Certain vehicles may have a condition in which the thermal break tabs induce stress into the radiator causing a coolant leak. Dealers are to… |
| N262570770 | Service campaign | Sep 15, 2026 | Certain vehicles may have a condition in which the thermal break tabs induce stress into the radiator causing a coolant leak. Dealers are to… |
| N242484750-02 | Warranty extension | Sep 1, 2026 | Special Coverage. Certain 2022 model year Buick Encore GX and Chevrolet Trailblazer vehicles, equipped with a 1.2L engine, may have a condi… |
| N242450640-02 | Warranty extension | Sep 1, 2026 | Special Coverage. Certain 2021 model year Buick Encore GX and Chevrolet Trailblazer vehicles, equipped with a 1.2L engine, may have a condi… |
| N232407740-03 | Warranty extension | Sep 1, 2026 | Special Coverage. Certain 2020 model year Buick Encore GX vehicles, equipped with a 1.2L engine, may have a condition that could cause the… |
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 N242484740 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 N242484740 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 N242484740 cover?
The manufacturer filed it against 20 model years across 4 brands (Chevrolet, GMC, Buick and Cadillac): 2022 Buick Encore, 2023 Buick Envision, 2022 Buick Envision, 2023 Cadillac CT4, 2022 Cadillac CT4, 2023 Cadillac CT5 and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.