GM bulletin N232428780
What it saysCertain vehicles may have a condition in which the transmission Control Valve Body Ball Check Valves can wear prematurely resulting in the possibility for them to become stuck or pass through the Control Valve Body… NHTSA’s full summary ↓
GM filed this with NHTSA as a service bulletin dated Feb 5, 2024, about the power train. It names 4 model years across Chevrolet and GMC (2017–2021). 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.
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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 a condition in which the transmission Control Valve Body Ball Check Valves can wear prematurely resulting in the possibility for them to become stuck or pass through the Control Valve Body Spacer Plate. The customer may not be able to shift into drive from park or reverse at the start of vehicle operation. Dealers are to replace the transmission Control Valve Body Spacer Plate package.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| N232428780 | Service bulletin | Feb 5, 2024 | 10249700 | PDF, 259 KB |
What the document itself lists
The manufacturer titles it “N232428780 - Customer Satisfaction Program”.
Parts the bulletin names
| Part number | Description | Qty | Find it |
|---|---|---|---|
| 24272467 | Control Valve Body Spacer Plate Package | — | eBay Motors → |
| 24236927 | Seal Kit | — | eBay Motors → |
| 88865601 | — | — | |
| 19421425 | Reminder: Parts may be removed from Retail Inven tory Management (RIM). Dealers… | — | eBay Motors → |
Labour operation and the time the manufacturer allows
| Operation | Description | Time |
|---|---|---|
| 9107142 | Customer Reimbursement Approved - For USA and Canada dealers only - For Export… | 0.2 hrs |
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. 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 2 model years
GMC 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 44 complaints with NHTSA since 2015. 6 of them name Power Train, 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.
The contact owns a 2017 GMC Savana. The contact stated that while driving at an undisclosed speed, the vehicle lost motive power. No warning light was illuminated. The contact was able to restart the vehicle. The vehicle was taken to an independent mechanic, who diagnosed and determined that the transmission needed to be replaced.
2017 GMC Savana · Power Train · filed with NHTSA Jun 13, 2023 · ODI 11526817
My 2021 Chevrolet express van with an 8L90 transmission has failed after only 80k miles, willing to have it inspected. Check engine codes show P0700 and P2714 on 02/08/25. No prior warning lamps. This product has put my safety at risk due to overheating and making the vehicle go into limp mode while on public roadways.
2021 Chevrolet Express · Power Train · filed with NHTSA Mar 8, 2025 · ODI 11647184
We've had 4 instances of "engine power reduced" and check engine light, with no prior warning of issue on the dash display. I believe this is due to an issue with the diesel particulate filter soot load tracking. The first 3 occurred on rural highway and the 4th on a local highway at speed.
2017 Chevrolet Express · Engine · filed with NHTSA Apr 15, 2019 · ODI 11196596
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 group30 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 |
|---|---|---|---|
| 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… |
| PIP5966A | Service bulletin | Mar 2, 2025 | This Preliminary information communicates Diagnostic aids for a no start or DTC'S following a transmission replacement |
| 16-NA-019 | Service bulletin | Feb 12, 2025 | This informational buleltin provides information on Transmission Adaptive Functions and Correcting Low Mileage Harsh Shifts, Slips, or Flare… |
| 09-06-04-026Z | Service bulletin | Jan 9, 2025 | This bulletin provides information on identifying Non-GM Engine Calibrations for Gasoline Engines using the Tech 2 or GDS 2. |
| 08-07-30-035I | Service bulletin | Nov 27, 2024 | This service bulletin provides information on the harmful effects of ethylene glycol in transmission fluid. |
| 04-06-01-029K | Service bulletin | Oct 28, 2024 | This informational bulletin explains Unscheduled Supplemental Services and the importance of GM Simplified Maintenance Schedules. |
| PIP6018 | Service bulletin | Oct 22, 2024 | This Preliminary information communicates to technicians inspection for an incorrectly machined fluid passage in the valve body causing DTC… |
| PIP6014 | Service bulletin | Oct 10, 2024 | This Preliminary information communicates for Technicians installing a Service Replacement Transmission Assembly to contact Technical Assist… |
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 GMC, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is GM N232428780 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 N232428780 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 N232428780 cover?
The manufacturer filed it against 4 model years across 2 brands (Chevrolet and GMC): 2021 Chevrolet Express, 2017 Chevrolet Express, 2021 GMC Savana, 2017 GMC Savana. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.