GM service campaign N242446290-02
What it saysVehicles may have a condition in which the clutch backing plate retaining ring and/or the clutch piston retaining ring inside the transmission are out of specification. NHTSA’s full summary ↓
GM filed this with NHTSA as a service campaign dated Jul 30, 2024, about the electrical system. It names 9 model years across Chevrolet, GMC, Buick and Cadillac (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 · 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.
vehicles may have a condition in which the clutch backing plate retaining ring and/or the clutch piston retaining ring inside the transmission are out of specification. Dealers are to overhaul the clutch piston housing.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| N242446290-02 | Service campaign | Jul 30, 2024 | 11005318 | PDF, 277 KB |
What the document itself lists
The manufacturer titles it “REVISION: N242446290-02 - Service Update”.
Parts the bulletin names — the first 40 it lists
| Part number | Description | Qty |
|---|---|---|
| 24268389 | SEAL ASM-A/TRNS FLUID PUMP | — |
| 24050076 | PISTON ASM-1-2-3-4-5-6 CLU | — |
| 24267678 | PLATE-1-2-3-4-5-6 CLU | — |
| 24267680 | PLATE-1-2-3-4-5-6 CLU BKG | — |
| 24267681 | RING-1-2-3-4-5-6 CLU BKG PLT RET | — |
| 24267848 | GASKET-T/CV HSG | — |
| 24277333 | SEAL-1-2-3-4-5-6 CLU PSTN INR | — |
| 24280145 | RING-2-9 CLU PSTN RET | — |
| 24282417 | SPRING-1-2-3-4-5-6 CLU PSTN RTN | — |
| 24285073 | SEAL-FLUID TRFER PIPE | — |
| 24285336 | SEAL-A/TRNS FLUID TEMP SEN (O RING) | — |
| 24286803 | PLATE-1-2-3-4-5-6 CLU (WAVED) | — |
| 24288671 | SEAL-CLU FLUID PASG | — |
| 24290714 | PLATE ASM-1-2-3-4-5-6 CLU (W/FRICT MATL) | — |
| 24297282 | SEAL-1-2-3-4-5-6 CLU PSTN | — |
| 11547841 | BOLT/SCREW-DRIVETRAIN & FRT SUSP CRADLE | — |
| 11549251 | BOLT/SCREW-TRANS RR MT | — |
| 11588738 | BOLT/SCREW-FRT CRADLE BR | — |
| 11603519 | CLAMP ASM-EXH PIPE | — |
| 11609598 | BOLT, TRANS RR MT BRKT | — |
| 11609605 | BOLT/SCREW-TRANS MT TRANS SI BRKT | — |
| 11611965 | WASHER-FRT WHL DRV SHF | — |
| 11612295 | NUT-FRT WHL DRV SHF | — |
| 12346290 | — | — |
| 10953464 | — | — |
| 12648665 | SEAL-INT MANIF | — |
| 12652450 | GASKET-THROT BODY | — |
| 12670252 | SEAL-OIL LVL IND TUBE (O RING) | — |
| 12685956 | SEAL-VAC PUMP OIL OTLT PIPE | — |
| 12735608 | FILTER ASM-OIL | — |
| 19132944 | SEAL-TRFER CASE INTER DRV SHF (O-RING) | — |
| 19132950 | CLIP-TRFER CASE INTER DRV SHF RET | — |
| 19432331 | — | — |
| 19432456 | — | — |
| 22816982 | GASKET-EXH MUFF | — |
| 22997477 | GASKET-EXH SYS FRT | — |
| 23161602 | GASKET-EXH SYS INTER | — |
| 23277803 | SEAL-PWR TRFER U INTERFACE (O-RING) | — |
| 23321677 | SEAL-PROP SHF TO DIFF CARR INTERFACE (O RING) | — |
| 23432713 | RETAINER-PWR TRFER U PROP SHF | — |
Read by machine from the document NHTSA serves (13 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 3 model years
GMC 2 model years
Buick 1 model year
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 9 model years this bulletin names have filed 520 complaints with NHTSA since 2015. 120 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.
On February 4, 2026, my wife drove to the bank, a trip of about 10 to 15 minutes, and turned off the car at the ATM. When she tried to leave, the vehicle wouldn't start. After a while, she opened and closed the door and locked and unlocked the car twice with the remote control, and the vehicle started and she was able to drive, but all…
2024 Chevrolet Blazer · Electrical System · filed with NHTSA Feb 5, 2026 · ODI 11715867
The contact owns a 2024 Buick Encore. The contact stated that while attempting to start the vehicle, the instrument panel displayed a blank screen. In addition, the contact stated that the failure occurred every 31 seconds. The vehicle was taken to the dealer where it was diagnosed with a failed VCU module.
2024 Buick Encore · Electrical System · filed with NHTSA May 21, 2026 · ODI 11739230
a little over two weeks ago we were going to sidney to get groceries. it was hot that day so we turned the a/c on. fog started coming out of the vents, it looked like we turned on a fog machine! a few days later we were going to town, my daughter got in and the whole driver's side floor was full of water.
2024 GMC Terrain · Electrical System · filed with NHTSA Aug 8, 2025 · ODI 11679365
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 group230 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 |
|---|---|---|---|
| N262565450 | Service campaign | Oct 26, 2026 | Customer Satisfaction Program. Certain vehicles listed above may have a condition in which remanufactured high voltage battery packs were b… |
| N242468490-02 | Service campaign | May 28, 2026 | Certain vehicles may have missing cavity plugs from the rear chassis harness electrical connector. Dealers are to inspect the rear chassis h… |
| 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. |
| 25-NA-074 | Service bulletin | Sep 4, 2025 | Some customers may comment on rear body structure stop lamp or rear closure signal lamp may be totally inoperative or staying illuminated. |
| 18-NA-180 | Service bulletin | Sep 4, 2025 | This Warranty Administration service bulletin provides Lithium-Ion battery Exchange Process and Transaction Submission information. |
| 23-NA-119 | Service bulletin | Sep 3, 2025 | This service bulletin provides service procedure information to correct a customer concern of Shift to Park Displayed on DIC When Vehicle is… |
| 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. |
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 N242446290-02 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 N242446290-02 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 N242446290-02 cover?
The manufacturer filed it against 9 model years across 4 brands (Chevrolet, GMC, Buick and Cadillac): 2024 Buick Encore, 2024 Cadillac XT4, 2024 Cadillac XT5, 2024 Cadillac XT6, 2024 Chevrolet Blazer, 2024 Chevrolet Trailblazer and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.