GM bulletin N242438500-04
What it saysGeneral Motors has decided to conduct a Voluntary Emission Recall involving certain 2024 Model Year Chevrolet Silverado and GMC Sierra vehicles with a 6.6L diesel engine. NHTSA’s full summary ↓
GM filed this with NHTSA as an emissions communication dated Nov 24, 2025, about the fuel/propulsion system. It names 4 model years across Chevrolet and GMC (2024). An emissions communication 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.
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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.
What it applies to, as the document itself states it — the build window in the manufacturer’s own words, read by machine from the PDF NHTSA serves. The build date is on the certification label in the driver’s door jamb; the dealer settles a borderline vehicle by its VIN.
Emission Recall. General Motors has decided to conduct a Voluntary Emission Recall involving certain 2024 Model Year Chevrolet Silverado and GMC Sierra vehicles with a 6.6L diesel engine. The Engine Control Module (ECM) may not properly diagnose, may not set Diagnostic Trouble Codes (DTCs), or may not illuminate the Malfunction Indicator Light (Check Engine Light) if certain fault conditions of the Selective Catalyst Reduction (SCR or NOx) catalyst occur. Dealers are to reprogram the ECM and TCM.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| N242438500-04 | Emissions | Nov 24, 2025 | 11025665 | PDF, 643 KB |
What the document itself lists
The manufacturer titles it “REVISION: N242438500-04 - Emission Recall”.
Labour operations and the time the manufacturer allows
| Operation | Description | Time |
|---|---|---|
| 9107153 | Verified Module Software or Calibration Level: Module Is Programmed with Same Level… | 0.2 hrs |
| 9107154 | Engine and Transmission Control Module Reprogramming with SPS ADD: Barometric… | 0.7 hrs |
Read by machine from the document NHTSA serves (9 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 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 356 complaints with NHTSA since 2015. 23 of them name 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.
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 fuel/propulsion system
Source: same model, same component group27 other manufacturer communications filed against these GM models under the same component group (fuel/propulsion system), newest first. The eight newest are listed; the rest are on the Chevrolet list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| N252526150 | Service campaign | Nov 4, 2025 | Service Update. Certain vehicles listed above may have a condition which can cause the fuel pump power control module to fail. If this wer… |
| 24-NA-139 | Service bulletin | Apr 12, 2025 | This bulletin provides a procedure to replace the FPDCM if found to cause customers concerns of Crank No Start, Stalling, Loss of Power, Fue… |
| 25-NA-066 | Service bulletin | Mar 22, 2025 | This bulletin provides information on checking the inspection/maintenance system status parameters in the ECM and how to have the parameters… |
| PIT5985G | Service bulletin | Dec 14, 2024 | This Preliminary information communicates diagnostic tips on how to resolve a issues with vehicles that will not power up after a can bus 2… |
| PIE0787B | Service bulletin | Nov 18, 2024 | This engineering information (EI) closure ends the need for gathering additional information from technicians in regard to diesel fuel on th… |
| PIT6259 | Service bulletin | Oct 15, 2024 | This Preliminary information communicates information on faulty replacement K111 Fuel Pump Driver Control Module. |
| 24-NA-225 | Service bulletin | Oct 15, 2024 | This bulletin provides information on how to look for and test for DEF or water in the fuel system and what the specs should be. |
| 17-NA-302 | Service bulletin | Sep 23, 2024 | This informational bulletin provides information on availability for a locking gas cap for trucks are operated in high amount of dirt or dus… |
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 N242438500-04 a recall?
No. A emissions communication 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 N242438500-04 repair free?
A emissions communication 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 N242438500-04 cover?
The manufacturer filed it against 4 model years across 2 brands (Chevrolet and GMC): 2024 Chevrolet Silverado 2500HD, 2024 Chevrolet Silverado 3500HD, 2024 GMC Sierra 2500HD, 2024 GMC Sierra 3500HD. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone. The document itself sets the build window: built before 1 Aug 2023 — the build date is on the certification label in the driver’s door jamb.