GM bulletin N232409730
What it saysCertain vehicles may have pinion gears that have low core and surface hardness. NHTSA’s full summary ↓
GM filed this with NHTSA as a service bulletin dated Mar 13, 2024, about the power train. It names 7 model years across Chevrolet, GMC and Cadillac (2023). 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.
One page for every brand it was filed under. Each brand’s bulletins: Chevrolet · GMC · 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.
Customer Satisfaction Program: Certain vehicles may have pinion gears that have low core and surface hardness. Dealers are to replace the transmission.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| N232409730 | Service bulletin | Mar 13, 2024 | 10251608 | PDF, 108 KB |
What the document itself lists
The manufacturer titles it “N232409730 - Customer Satisfaction Program”.
Parts the bulletin names
| Part number | Description | Qty | Find it |
|---|---|---|---|
| 24043559 | Transmission | — | eBay Motors → |
| 24043607 | Transmission | — | eBay Motors → |
| 24294945 | Transmission | — | eBay Motors → |
| 24294946 | Transmission | — | eBay Motors → |
| 24297325 | Transmission | — | eBay Motors → |
| 24297326 | Transmission | — | eBay Motors → |
| 24297328 | Transmission | — | eBay Motors → |
| 24294952 | Transmission | — | eBay Motors → |
| 15035747 | Exhaust System Seal | — | eBay Motors → |
| 15077362 | Exhaust System Seal | — | eBay Motors → |
| 24245110 | Transfer Case Adapter Gasket | — | eBay Motors → |
| 84308104 | Transfer Case Front Output Shaft Boot Clamp-Prop Side | — | eBay Motors → |
| 23135703 | Transmission Fluid Cooler Seal | — | eBay Motors → |
| 23278166 | Transmission Fluid Cooler Pipe Seal | — | eBay Motors → |
| 84124171 | Transfer Case Front Output Shaft Boot Clamp-Tcase Side | — | eBay Motors → |
| 84763642 | Exhaust System Front Gasket | — | eBay Motors → |
| 12687531 | Catalytic Converter Gasket | — | eBay Motors → |
| 84534856 | Catalytic Converter Gasket | — | eBay Motors → |
| 23436598 | Exhaust Pipe Clamp LH | — | eBay Motors → |
| 84517849 | Transfer Case Front Output Shaft Boot Clamp | — | eBay Motors → |
| 11588468 | Transmission Torque Converter Bolt | — | eBay Motors → |
| 22860193 | Catalytic Converter Clamp | — | eBay Motors → |
| 12624939 | Exhaust System Front Gasket | — | eBay Motors → |
| 21992620 | Exhaust System Seal | — | eBay Motors → |
| 11547342 | Transmission Torque Converter Bolt | — | eBay Motors → |
| 19352619 | Dexron ULV Transmission Fluid | — | eBay Motors → |
| 19352620 | Obtain locally | — | eBay Motors → |
Read by machine from the document NHTSA serves (5 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. 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 themChevrolet 3 model years
GMC 2 model years
Cadillac 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 7 model years this bulletin names have filed 1,871 complaints with NHTSA since 2015. 381 of them name Power Train — 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.
At 5000 miles after the last oil change, my low oil light came on, took it to my local mechanic and he said it was 3 quarts low. took it to the dealership and they say this is normal but have me to a check every time i put gas up to 2000 miles. bring it back and they say its one quart low and this is normal.
2023 Chevrolet Tahoe · Power Train · filed with NHTSA Jun 26, 2024 · ODI 11596823
The contact owns a 2023 GMC Yukon. The contact stated that after starting the vehicle, the transmission shifter failed to shift from park. The contact stated that the "Braking System", Brake Pad Monitor, and Traction Control messages were displayed. The vehicle was towed to the local dealer.
2023 GMC Yukon · Power Train · filed with NHTSA Nov 25, 2024 · ODI 11627169
UNKNOWN. The car decelerated on the freeway from 80 mph by automatically going into N. Once we managed to pull over to the shoulder, the car would not turn on again or shift gears. The dealership thinks it's an engine failure and they have multiple escalades in the shop for the same issue
2023 Cadillac Escalade · Power Train · filed with NHTSA Dec 4, 2024 · ODI 11628745
In depth: 2023 Chevrolet Silverado transmission and drivetrain problems → · 2023 GMC Sierra transmission and drivetrain problems → · 2023 GMC Yukon transmission and drivetrain 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 power train
Source: same model, same component group106 other manufacturer communications filed against these GM models under the same component group (power train), newest first. The eight newest are listed; the rest are on the Chevrolet list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| N252502891-01 | Service campaign | Aug 20, 2026 | Certain vehicles may have a condition in which the internal differential nut was cross threaded or missing during assembly. Dealers will rev… |
| N252517790 | Service campaign | Oct 14, 2025 | Certain vehicles, equipped with 8L80 or 8L90 Transmissions, may have a condition in which the reaction carrier cracks. Dealers are to replac… |
| N242454441 -03 | Service campaign | Oct 9, 2025 | Certain vehicles listed above, may have a condition where the transmission control valve has worn, resulting in a gradual loss of pressure w… |
| 25-NA-080 | Service bulletin | Sep 4, 2025 | This service bulletin provides a procedure to overhaul the control valve to replace a plate and worn down check ball to correct the customer… |
| N252494003-01 | Service campaign | Jun 26, 2025 | Certain vehicles listed above, may have a condition where the connecting rod and/or crankshaft engine components in these vehicles may have… |
| N242480631-02 | Service campaign | May 27, 2025 | Certain vehicles listed above, may have a condition where the transmission control valve has worn, resulting in a gradual loss of pressure w… |
| N242480631-01 | Service campaign | May 22, 2025 | Certain vehicles listed above, may have a condition where the transmission control valve has worn, resulting in a gradual loss of pressure w… |
| N242483540-01 | Service campaign | May 21, 2025 | Certain vehicles listed above may have a condition in which the transmission may not shift properly. Dealers are to replace the transmission… |
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 and Cadillac, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is GM N232409730 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 N232409730 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 N232409730 cover?
The manufacturer filed it against 7 model years across 3 brands (Chevrolet, GMC and Cadillac): 2023 Cadillac CT5, 2023 Cadillac Escalade, 2023 Chevrolet Camaro, 2023 Chevrolet Silverado, 2023 Chevrolet Tahoe, 2023 GMC Sierra and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.