GM 10-Speed Transmission Recall: Which Recall Covers Your Truck or SUV

General Motors has now filed four safety recalls with the National Highway Traffic Safety Administration (NHTSA) for the same problem in its 10-speed automatic transmission: the wheels can lock while you are driving. In three of the four, NHTSA names the transmission control valve as the part that fails.

The first and largest, 24V797, covers 463,295 diesel Silverado and Sierra trucks and 2021 diesel SUVs. In 2025 and 2026 GM added Camaro and Cadillac cars (25V148), a do-over for trucks that were fixed incorrectly (26V083), and 2022 full-size SUVs with electronic shift (26V085). If you read about this recall in 2024 or 2025, some of what you read is out of date.

Which GM 10-Speed Recall Covers Your Vehicle

Vehicle counts and dates are from NHTSA's recall records. Each recall covers certain VINs only, so two trucks of the same year can have a different answer.

Does my vehicle have this recall?

Already Had the Fix? Check for the 26V083 Redo

On February 12, 2026, GM told NHTSA that some trucks repaired under 24V797 may have been repaired incorrectly. That follow-up recall, 26V083, covers 1,055 vehicles: 2020 Silverado and Sierra 2500 and 3500, and 2020-2022 Silverado and Sierra 1500. The Drive reported that these trucks were given the wrong version of the transmission software, so it may not catch the early signs of valve wear the update is meant to catch.

If your truck had the 24V797 update, run your VIN again. NHTSA says the VINs in 26V083 became searchable on February 12, 2026, and owner letters went out March 6, 2026. If it shows as open, the dealer inspects the truck and updates the software again, free.

What the Dealer Fix Does, and What It Does Not

The recall remedy is software, not a new transmission. For 24V797, NHTSA describes new transmission control module software plus a special coverage program that pays to repair any transmission the software identifies as having a defective control valve.

WardsAuto, summarizing GM's filing, reported how it works: the software watches the control valve and is designed to detect excess wear about 10,000 miles before a lock-up could happen. When it does, it limits the transmission to fifth gear until the next key cycle. That is deliberate. Holding fifth gear prevents the downshift from eighth gear where the lock-up occurs.

What it does not do: The Drive notes that the software does not fix the valve body itself or stop it from wearing. It stops unsafe shifts. The Drive also reported in February 2026 that GM had released an updated valve body for its light-duty 10-speeds, and that the jury is still out on how well that remedy works.

2020 GMC Sierra 2500HD. Diesel 2020-2022 Sierra 1500, 2500 and 3500 trucks are in recall 24V797. Photo: Bull-Doser, public domain, via Wikimedia Commons.

Heavy-Duty 2500 and 3500 Owners

The heavy-duty Duramax trucks are where this recall started. WardsAuto reported that GM opened its own investigation on July 16, 2024, after a whistleblower report that the rear wheels on a 2021 Sierra 2500 HD locked up while towing a trailer, causing property damage to the truck and trailer. GM issued its dealers a stop-sale order for the recalled vehicles on October 24, 2024.

Two recalls can apply to an HD truck: 24V797 for 2020-2022 Silverado and Sierra 2500 and 3500 diesels, and the 26V083 redo for 2020 models. The heavy-duty 10-speed is marketed as Allison-branded, but WardsAuto reported that Allison Transmission says GM builds it.

If you tow, get the recall done before your next heavy trip, and treat banging downshifts or a reduced propulsion message as a reason to unhitch and get the truck checked.

What Fails Inside the Transmission

The valve body is the transmission's hydraulic control center. It routes fluid pressure to the clutches that apply and release for each gear. According to the recall filings as reported by WardsAuto, excessive wear inside the control valve body can make the fluid pressure drop, which can let certain shift valves move unexpectedly. The result ranges from harsh shifting to, in rare cases, the rear wheels locking during a downshift from eighth gear.

NHTSA's consequence statement for the truck and SUV recall is short: “Rear wheel lock-up can increase the risk of a crash.”

Warning Signs to Watch For

• Harsh or banging shifts, most of all on downshifts while slowing from highway speed.
• A "reduced propulsion" message on the dash. WardsAuto reported this message in its summary of the 24V797 filing.
• After the recall software is installed: a service engine light and the truck holding fifth gear. That is the software doing its job, not a new failure, and it needs a visit to the dealer.
• A transmission warning light or stored transmission codes that come back after being cleared.

A 2023 GMC Yukon XL. Diesel 2021 Yukons are in recall 24V797, and 2022 Yukons with electronic shift are in 26V085. Photo: HJUdall, CC0, via Wikimedia Commons.

How to Check Your VIN in Five Minutes

1. Find your 17-character VIN on the lower driver-side corner of the windshield, the driver door jamb sticker, your registration or your insurance card.
2. Enter it at nhtsa.gov/recalls. It lists every open recall on that exact vehicle, including 24V797, 26V083, 26V085 and 25V148.
3. Check it again at GM's owner center (experience.gm.com/ownercenter/recalls) or on the Chevrolet, GMC or Cadillac owner site, which also shows whether a dealer has already done the work.
4. If a recall is open, call any Chevrolet, GMC or Cadillac dealer to book it. Recall work is free.
5. Keep the repair order. If your truck is later named in a follow-up campaign such as 26V083, it shows what was done and when.

Phone numbers NHTSA lists for these recalls:

• Chevrolet customer service: 1-800-222-1020
• GMC customer service: 1-800-462-8782
• Cadillac customer service (24V797, 26V085): 1-800-458-8006
• Cadillac customer service (25V148): 1-800-333-4223
• GM customer service: 1-888-988-7267

What To Do Now

The recall work itself is done by a Chevrolet, GMC or Cadillac dealer, because it needs GM's approved campaign software. A recall lookup tells you whether a campaign applies. It does not tell you whether your transmission is already wearing.

If your truck or SUV is shifting hard, holding a gear or showing a transmission warning, or it is outside the recall and you want to know where it stands, our technicians in Rohnert Park can scan it, road-test it and tell you what we find.

If symptoms appear while you are driving, signal, move to the shoulder safely, turn on your hazards and call for a tow. Do not keep towing.

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