GM service campaign N232433891
What it saysVarious vehicle makes and models listed may have a condition in which the transmission case leaks fluid due to porosity around a mount bolt hole. NHTSA’s full summary ↓
GM filed this with NHTSA as a service campaign dated May 16, 2024, about the engine. It names 10 model years across Chevrolet, GMC, Buick and Cadillac (2023–2024). 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.
Get the next GM bulletin for your model by email Weekly, only when something new is filed. Nothing else; one-click unsubscribe.
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.
Customer Satisfaction Program - Various vehicle makes and models listed may have a condition in which the transmission case leaks fluid due to porosity around a mount bolt hole. Dealers will replace the transmission case.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| N232433891 | Service campaign | May 16, 2024 | 11000178 | PDF, 165 KB |
What the document itself lists
The manufacturer titles it “N232433891 - Customer Satisfaction Program”.
Parts the bulletin names — the first 40 it lists
| Part number | Description | Qty |
|---|---|---|
| 24044528 | Transmission Case Assembly | — |
| 24284191 | Transmission Case Assembly | — |
| 24044529 | Transmission Case Assembly | — |
| 24284344 | Transmission Case Assembly | — |
| 24044530 | Transmission Case Assembly | — |
| 24287500 | Transmission Case Assembly | — |
| 24285336 | Transmission Temperature Sensor O Ring | — |
| 24264987 | Transmission Case O Ring | — |
| 24271624 | Accumulator Bypass Valve Seal | — |
| 24285073 | Fluid Transfer Pipe Seal | — |
| 24267848 | Torque Converter Housing Gasket | — |
| 24288671 | Clutch Fluid Passage Seal Kit | — |
| 11602946 | Automatic Trans Case Hole Plug | — |
| 88865601 | — | — |
| 19421425 | — | — |
| 84997134 | Exhaust System Intermediate Gasket | — |
| 22816982 | Exhaust Muffler Gasket | — |
| 11603519 | Exhaust Pipe Clamp Assembly | — |
| 12670252 | Oil Level Tube O Ring | — |
| 11547841 | RR Suspension Cradle Bolts | — |
| 11561299 | Torsion Bar Support Screw | — |
| 12735608 | Oil Filter Assembly | — |
| 19432331 | — | — |
| 19432456 | — | — |
| 12346290 | — | — |
| 10953464 | — | — |
| 12652450 | Throttle Body Gasket | — |
| 12648665 | Intake Manifold Seal | — |
| 22997477 | Exhaust System Front Gaskets | — |
| 84135650 | Catalytic Converter Gasket | — |
| 23161602 | Exhaust System Intermediate Seal | — |
| 12685956 | Vacuum Pump Oil Outlet Pipe Seal | — |
| 11588739 | Front Cradle Bolt | — |
| 11588738 | Front Cradle Bolt | — |
| 23238284 | Exhaust System Front Gasket | — |
| 12637018 | Intake Manifold Gasket | — |
| 12637017 | Throttle Body Gasket | — |
| 12643268 | Exhaust Pipe Clamp Assembly | — |
| 12641115 | Catalytic Converter Gasket | — |
| 11549251 | Trans Rear Mount Bolt | — |
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.
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 2 model years
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.
Email me new GM bulletins for one of these models
A weekly email, sent only in a week when GM files something new with NHTSA for the model you pick — service bulletins, campaigns, warranty extensions, over-the-air notices, every model year. Nothing else is sent; one-click unsubscribe in every message. Separate from recall alerts.
What owners reported
Source: NHTSA complaint databaseOwners of the 10 model years this bulletin names have filed 475 complaints with NHTSA since 2015. 207 of them name Power Train, Engine, Fuel/Propulsion 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.
Engine problem loss of power intermittently no reverse. They replaced clutch parts seals, piston, rings, plates, and plates. Had Vehicle for about 22 days. Driving home after repairs completed. Cluster display- instrument panel went out. Called Dealer and Cadillac assistance. Says there nothing they can do until Cadillac releases a fix.
2024 Cadillac XT5 · Engine · filed with NHTSA Jun 24, 2024 · ODI 11596124
Transmission dropped complete out of gear while driving. Got vehicle moving again. Took to dealership. Found complete internal transmission failure at 6779 miles. Transmission replaced with new unit. New transmission has erratic / hard shifts. Found replacement transmission leaking fluid due to front pump / porous case at 14800 miles.
2024 GMC Terrain · Power Train · filed with NHTSA Feb 2, 2026 · ODI 11714938
7-8 mild transmission slips/sticking 3 MAJOR transmission events where the car seized up completely and stopped running. Almost felt like a car crash. Very abrupt stop and almost caused people behind us to rear end us Car is only 21 months old / 17,000 miles. Most recent was in early August. We have not driven car since out of fear
2023 Chevrolet Traverse · Power Train · filed with NHTSA Sep 18, 2024 · ODI 11615200
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 group159 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… |
| 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… |
| N262568830 | Service campaign | Aug 4, 2026 | Certain vehicles listed above may have a condition in which the oil filter was not adequately tightened. Dealers are to check and tighten th… |
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 N232433891 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 N232433891 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 N232433891 cover?
The manufacturer filed it against 10 model years across 4 brands (Chevrolet, GMC, Buick and Cadillac): 2024 Buick Enclave, 2024 Buick Encore, 2024 Cadillac XT4, 2024 Cadillac XT5, 2024 Cadillac XT6, 2024 Chevrolet Blazer and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.