GM bulletin 22-NA-137
What it saysThis technical bulletin provides a procedure to locate and repair a transmission leak that may be coming from port plugs near the rear of the transmission. NHTSA’s full summary ↓
GM filed this with NHTSA as a service bulletin dated Jun 22, 2023, received Jul 12, 2023, about the power train. It names 4 model years across Chevrolet and GMC (2022). 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 communicationThis technical bulletin provides a procedure to locate and repair a transmission leak that may be coming from port plugs near the rear of the transmission.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| 22-NA-137 | Service bulletin | Jun 22, 2023 | 10239084 | PDF, 174 KB |
What the document itself lists
The manufacturer titles it “Transmission Fluid Leak from Center of Vehicle”.
Parts the bulletin names
| Part number | Description | Qty | Find it |
|---|---|---|---|
| 11548770 | TRNS CASE | — | eBay Motors → |
| 19333512 | — | — | |
| 10953480 | N/A Transmission | — | eBay Motors → |
| 19352619 | — | — | |
| 19352620 | — | — | |
| 84013962 | — | — | |
| 15126137 | — | — | |
| 84526283 | — | — | |
| 11548787 | Mount Bolt | 2 | eBay Motors → |
| 11548414 | Mount Nut | 2 | eBay Motors → |
| 84626017 | — | — | |
| 84654006 | — | — | |
| 24286193 | Extension Seal | 1 | eBay Motors → |
Labour operation and the time the manufacturer allows
| Operation | Description | Time |
|---|---|---|
| 8486198 | Transmission Case Plug Replacement at Oil Pan Rail | 0.4 hrs |
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 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 205 complaints with NHTSA since 2015. 38 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.
My truck is expierancing the symptoms of recall # n242454440 transmission valve body, its shuttering between shifts and clunking im afraid of the rear wheels locking up from the horror stories I have read the truck is at coulter Gmc now for exact diag but from everything I have read this is common issue for this recall that my VIN does…
2022 GMC Sierra 3500HD · Power Train · filed with NHTSA Sep 10, 2025 · ODI 11686290
I am receiving a "Shift to Park" warning intermittently when parking my truck. The truck is in park, but the transmission does not recognize this and flashes the warning on the dash and chimes. While this is happening, I cannot lock the vehicle, and the battery is being drained.
2022 GMC Sierra 2500HD · Power Train · filed with NHTSA Aug 4, 2025 · ODI 11678157
The contact owns a 2022 Chevrolet Silverado 3500. While at a stoplight the transmission malfunctioned and the vehicle failed to drive forward or reverse. After restarting the vehicle, the vehicle was reversed into a nearby service station.
2022 Chevrolet Silverado 3500HD · Power Train · filed with NHTSA Apr 1, 2026 · ODI 11728440
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 group59 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 |
|---|---|---|---|
| N262567720 | Service campaign | Sep 17, 2026 | Certain vehicles may have received transmission mounting bolts that do not meet expected hardness specifications. Loose or failed bolts may… |
| N262560680 | Service campaign | Jun 10, 2026 | Certain vehicles may have a condition in which the bolts for the transmission control valve body may be loose or missing. Dealers will retor… |
| 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… |
| 24-NA-262 | Service bulletin | Jun 3, 2025 | This bulletin helps aid the tech in possible 10L100 transmission noise that may be normal or abnormal depending on the concern noted. |
| 22-NA-182 | Service bulletin | May 16, 2025 | This service bulletin advises the technician to check if the transmission cooler lines are twisted to correct customer concerns of Harsh Shi… |
| 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-075 | Service bulletin | May 8, 2025 | This bulletin provides a procedure to add a shim to the rear axle to change the pitch of said axle to correct the angle of the axle to pinio… |
| 21-NA-238 | Service bulletin | May 8, 2025 | This technical bulletin provides a procedure to inspect the front pump of the transmission for a possible leak. |
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 22-NA-137 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 22-NA-137 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 22-NA-137 cover?
The manufacturer filed it against 4 model years across 2 brands (Chevrolet and GMC): 2022 Chevrolet Silverado 2500HD, 2022 Chevrolet Silverado 3500HD, 2022 GMC Sierra 2500HD, 2022 GMC Sierra 3500HD. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.