GM service campaign N262572131-01
What it saysCertain vehicles listed above may have a condition in which the oil galley in the cylinder head was not drilled properly. NHTSA’s full summary ↓
GM filed this with NHTSA as a service campaign dated Oct 23, 2026, about the engine. It names 4 model years across Chevrolet and GMC (2026). 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.
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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 listed above may have a condition in which the oil galley in the cylinder head was not drilled properly. Dealers are to inspect and if necessary, replace the engine.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| N262572131-01 | Service campaign | Oct 23, 2026 | 11038674 | PDF, 721 KB |
What the document itself lists
The manufacturer titles it “UPDATE: N262572131-01 - Customer Satisfaction Program”.
Parts the bulletin names — the first 40 it lists
| Part number | Description | Qty |
|---|---|---|
| 12740949 | Engine Assembly | — |
| 12816379 | Turbocharger | — |
| 13418809 | Air Conditioning Compressor and Condenser Hose Seal-Large | — |
| 13418808 | Air Conditioning Compressor and Condenser Hose Seal-Large | — |
| 13418807 | Air Conditioning Compressor and Condenser Hose Seal-Small | — |
| 12654651 | Camshaft Cover Washer | — |
| 12683878 | Catalytic Converter Clamp | — |
| 12672821 | Catalytic Converter Gasket | — |
| 12664576 | Combustion Fuel Injector Seal | — |
| 12643149 | Engine Coolant Thermostat Housing Gasket | — |
| 11603876 | Engine Mount Frame Side Bolt | — |
| 12648140 | Exhaust Gas Recirculation Coolant Feed Pipe Seal | — |
| 12737098 | Exhaust Gas Recirculation Cooler Pipe Gasket | — |
| 12688014 | Exhaust Gas Recirculation Pipe Gasket | — |
| 12680216 | Exhaust Gas Recirculation Pipe Gasket | — |
| 12677819 | Exhaust Gas Recirculation Valve Gasket | — |
| 12683493 | Exhaust Pipe Clamp | — |
| 12672822 | Exhaust System Front Gasket | — |
| 12671767 | Exhaust System Front Gasket | — |
| 84013962 | Exhaust System Seal | — |
| 11603556 | Exhaust Turbocharger Inlet Pipe Bolt | — |
| 12688018 | Exhaust Turbocharger Inlet Pipe Gasket | — |
| 12688019 | Exhaust Turbocharger Inlet Pipe Gasket | — |
| 12638504 | Fuel Injection Pump Bracket Seal | — |
| 11611340 | Fuel Injector Bracket Bolt | — |
| 12686813 | Fuel Injector Seal | — |
| 12685923 | High Pressure Diesel Fuel Feed to Injector Pipe | — |
| 12685924 | High Pressure Diesel Fuel Feed to Injector Pipe | — |
| 12685931 | High Pressure Diesel Fuel Feed to Rail Pipe – Pump to Rail | — |
| 12707344 | High Pressure Diesel Fuel Feed to Rail Pipe – Rail to Rail | — |
| 12676951 | Oil Level Indicator Tube Seal | — |
| 12714574 | Positive Crankcase Ventilation Oil Separator Gasket | — |
| 12671847 | Positive Crankcase Ventilation Tube Gasket | — |
| 12737097 | Thermostat Bypass Pipe Gasket | — |
| 12658352 | Thermostat Bypass Pipe Seal | — |
| 85630657 | Transmission Fluid Cooler Pipe Fitting Seal | — |
| 88996648 | Transmission Fluid Cooler Pipe Connector Retainer | — |
| 12651147 | Turbocharger Air Inlet Adapter Seal | — |
| 12691866 | Turbocharger Coolant Feed and Return Pipe Gasket | — |
| 12700564 | Turbocharger Gasket | — |
Labour operations and the time the manufacturer allows
| Operation | Description | Time |
|---|---|---|
| 9108631 | Inspect Only – No Further Action Required Add: Inspect LH Cylinder Head Rocker Arms… | 0.5 hrs |
| 9108632 | Engine Replacement (Includes time for inspection, turbo replacement, and… | 24.6 hrs |
Read by machine from the document NHTSA serves (8 pages), read Oct 25, 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 31 complaints with NHTSA since 2015. 4 of them name 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.
My 2026 Chevrolet Silverado 3500 with the 6.6L Duramax diesel has experienced three separate P2463 Diesel Particulate Filter excessive soot accumulation events at approximately 4,300, 5,500, and 10,280 miles. Each event required a Chevrolet dealer to perform a forced regeneration to restore normal operation.
2026 Chevrolet Silverado 3500HD · Engine · filed with NHTSA Jun 19, 2026 · ODI 11745220
I recently purchased my vehicle from Big Star Dealership in Baytown Tx. At a little over 1000 miles i was towing a camper. The vehicle stalled, fuel pouring from engine. It was towed and repaired due to fuel pump failure. At a little over 3000 miles the vehicle would not start.
2026 GMC Sierra 2500HD · Engine · filed with NHTSA May 15, 2026 · ODI 11737988
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 group92 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 |
|---|---|---|---|
| N262572131 | Service campaign | Aug 28, 2026 | Customer Satisfaction Program. Certain vehicles listed above may have a condition in which the oil galley in the cylinder head was not dril… |
| 25-NA-339 | Service bulletin | Nov 6, 2025 | Under Field Actions N252494000, N252494001, the service procedure includes performing a PICO test on vehicle engines within the identified s… |
| 22-NA-080 | Service bulletin | Sep 6, 2025 | This technical bulletin provides a procedure to replace the camshaft actuator magnet to correct customer concerns of engine related shudder. |
| 25-NA-150 | Service bulletin | Jun 5, 2025 | This bulletin provides a procedure to check and replace the oil cooler seals before just replacing the oil cooler, for an oil leak. |
| 00-06-01-026R | Service bulletin | Jun 5, 2025 | This service bulletin provides information on replacing the intake manifold when the engine is replaced after severe internal engine damage. |
| 23-NA-170 | Service bulletin | May 16, 2025 | This bulletin advises the tech to inspect deeper into what may be the main cause of an engine failure. |
| 23-NA-153 | Service bulletin | May 15, 2025 | The service bulletin advises the tech of a normal transmission shift condition and the delay in throttle response when the throttle plate is… |
| 15-NA-010 | Service bulletin | May 7, 2025 | This service bulletin provides information to dealership personnel for new vehicles with less than 1,000 miles that may not pass California… |
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 N262572131-01 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 N262572131-01 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 N262572131-01 cover?
The manufacturer filed it against 4 model years across 2 brands (Chevrolet and GMC): 2026 Chevrolet Silverado 2500HD, 2026 Chevrolet Silverado 3500HD, 2026 GMC Sierra 2500HD, 2026 GMC Sierra 3500HD. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.