GM service campaign N262556930-01
What it saysCertain vehicles may have a condition in which the transfer case drive chain sprocket is cracked. NHTSA’s full summary ↓
GM filed this with NHTSA as a service campaign dated Jun 17, 2026, about the power train. It names 2 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.
Certain vehicles may have a condition in which the transfer case drive chain sprocket is cracked. Dealers are to replace the transfer case.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| N262556930-01 | Service campaign | Jun 17, 2026 | 11033928 | PDF, 350 KB |
What the document itself lists
The manufacturer titles it “UPDATE: N262556930-01 – Customer Satisfaction Program”.
Parts the bulletin names
| Part number | Description | Qty |
|---|---|---|
| 84308104 | CLAMP, TRFER CASE FRT OUTPUT SHF BOOT | — |
| 86816628 | GASKET, TRFER CASE ADAP | — |
| 84653921 | MOUNT, TRANS | — |
| 19333512 | — | — |
| 10953480 | — | — |
| 88865601 | — | — |
| 19421425 | — | — |
Labour operation and the time the manufacturer allows
| Operation | Description | Time |
|---|---|---|
| 9108438 | Transfer Case Assembly Replacement ADD: w/ RPO UXA ADD: w/ RPO NP | 3 hrs |
Read by machine from the document NHTSA serves (4 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 1 model year
GMC 1 model year
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 2 model years this bulletin names have filed 28 complaints with NHTSA since 2015. 5 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.
I’ve included all my repair orders regarding to coolant smell/leak and transmission shutter. I purchased my truck on XXX. We had planned a family vacation to , and we were driving up when I felt the transmission shutter at around 3:00 to 5:00 p.m. while cruising at approximately 55 to 62 mph.
2026 GMC Canyon · Power Train · filed with NHTSA Sep 9, 2026 · ODI 11763030
I was pushing the accelerator, and the transmission hesitated at about 45 mph. For about 2-3 seconds, the vehicle would not upshift. The RPMs revved, and finally the vehicle slam-shifted into gear. The vehicle drove normally for the rest of the drive cycle
2026 GMC Canyon · Power Train · filed with NHTSA Jul 1, 2026 · ODI 11747612
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 group42 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 |
|---|---|---|---|
| N262556930 | Service campaign | Jun 2, 2026 | Certain vehicles may have a condition in which the transfer case drive chain sprocket is cracked. Dealers are to replace the transfer case. |
| 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… |
| PIE0824A | Service bulletin | May 10, 2025 | This engineering information (EI) closure ends the need for gathering further information from field in regard to fluid leaking at the outpu… |
| 24-NA-078 | Service bulletin | May 7, 2025 | This bulletin advises the tech to replace the starter and not the trans if grinding or growling is heard from the transmission area. |
| PIE0824 | Service bulletin | Mar 27, 2025 | This engineering information (EI) is requesting information from technicians to perform the check list provided and contact the engineer lis… |
| 23-NA-185 | Service bulletin | Mar 25, 2025 | This service bulletin helps diagnose/reduce possible CCND issues on Transfer Cases - Service 4WD on DIC, Intermittent Failures, Noise Concer… |
| 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… |
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 N262556930-01 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 N262556930-01 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 N262556930-01 cover?
The manufacturer filed it against 2 model years across 2 brands (Chevrolet and GMC): 2026 Chevrolet Colorado, 2026 GMC Canyon. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.