How many transmission complaints does the 2020 GMC Sierra 2500 have?

NHTSA lists 24 Transmission & Powertrain complaints for the 2020 Sierra 2500, which is 32% of the 76 total complaints filed for that model year.

Is there a transmission recall for the 2020 GMC Sierra 2500?

Yes. NHTSA lists two related recalls, campaign 26V083000 and campaign 24V797000, both addressing transmission control module or software issues on the 2020 Sierra 2500.

At what mileage do transmission problems show up on the 2020 Sierra 2500?

The median mileage at failure reported to NHTSA for this problem area is 114,000 miles.

Do these transmission complaints involve crashes or fires?

NHTSA data for this problem area on the 2020 Sierra 2500 shows 0 crashes, 0 fires, and 0 injuries reported.

Does the recall fix fix report on the software update?

One owner complaint stated the transmission still did not shift correctly after the recall software update and after two valve body replacements.

2020 GMC Sierra 2500 Transmission & Powertrain Problems

NHTSA lists 24 Transmission & Powertrain complaints for the 2020 GMC Sierra 2500, 32% of all 76 complaints filed for the year. Median mileage at failure is 114,000. Two related recalls (26V083000 and 24V797000) cover transmission control software.

Transmission & Powertrain complaints: 24; 32% of 76
Crashes reported: 0
Fires reported: 0
Injuries reported: 0
Median mileage: 114,000 mi
Related recalls: 2

Typical transmission symptoms owners report

Owners report sudden loss of motive power while driving, including at highway speed while towing heavy loads, with no warning light in some cases.
Some describe the transmission jerking, skipping gears while shifting, or the check engine light cycling on and off.
Several owners say the rear wheels made a squealing or chirping sound tied to a rear wheel lock-up condition, causing the truck to pull to one side.
Multiple complaints describe waiting for recall parts under Campaign 24V797000 that were not yet available at the dealer, despite what owners felt was an unreasonable delay.
One owner reported the transmission still not shifting correctly after the recall software update and after two replacement valve bodies, with the transmission described as prone to locking up.
One complaint described the truck shifting into drive and moving on its own while idling and unattended.

When 2020 GMC Sierra 2500 transmission complaints were filed

First complaint Jan 3, 2023, latest Sep 24, 2026.

24 complaints filed with NHTSA from Jan 2023 to Sep 2026; peak Feb 2025 (4).

Transmission & Powertrain recalls for the 2020 GMC Sierra 2500

NHTSA 26V083000Feb 12, 2026Transmission & Powertrain1,055 vehicles
Power train:automatic transmission:fluid/lubricant:valves/valve body
General Motors, LLC is recalling certain 2020 Chevrolet Silverado 2500, 3500, GMC Sierra 2500, 3500, and 2020-2022 Chevrolet Silverado 1500 and GMC Sierra 1500 vehicles that may have been repaired incorrectly under recall 24V797. The transmission control valve may fail and cause the rear wheels to lock up.
Risk: Rear wheel lock up increases the risk of a crash.
Remedy: Dealers will inspect the vehicles and update the transmission control software, free of charge. Owner notification letters were mailed March 6, 2026. Owners may contact GMC customer service at 1-800-462-8782 or Chevrolet customer service at 1-800-222-1020. GM's number for this recall is N252516560. Vehicle Identification Numbers (VINs) involved in this recall became searchable on NHTSA.gov on February 12, 2026.
NHTSA 24V797000Oct 24, 2024Transmission & Powertrain463,295 vehicles
Power train:automatic transmission:fluid/lubricant:valves/valve body
General Motors, LLC (GM) is recalling certain 2020-2022 Chevrolet Silverado 1500, 2500, 3500, GMC Sierra 1500, 2500, 3500, 2021 Cadillac Escalade, Escalade ESV, Chevrolet Tahoe, Suburban, GMC Yukon, and Yukon XL vehicles equipped with diesel engines. The transmission control valve may fail and cause the rear wheels to lock-up.
Risk: Rear wheel lock-up can increase the risk of a crash.
Remedy: Dealers will install new transmission control module software, free of charge. GM will provide a special coverage program to cover the repair of transmissions that are identified by the remedy software as containing a defective control valve. Owner notification letters were mailed December 12, 2024. Owners may contact GM customer service at 1-888-988-7267, Cadillac customer service at 1-800-458-8006, GMC customer service at GMC 1-800-462-8782 or Chevrolet customer service at 1-800-222-1020. GM's number for this recall is N242454440.

Transmission & Powertrain complaints by Sierra 2500 model year

Raw complaint counts per model year; newer years have had less time to accumulate complaints.

20100 (0%)
20116 (10%)
20124 (13%)
20135 (11%)
20143 (10%)
20158 (9%)
20161 (2%)
20176 (16%)
20183 (9%)
20192 (6%)
202024 (32%)
202112 (24%)
20225 (12%)
202320 (63%)
202427 (25%)
20253 (11%)

Frequently asked questions

How many transmission complaints does the 2020 GMC Sierra 2500 have?: NHTSA lists 24 Transmission & Powertrain complaints for the 2020 Sierra 2500, which is 32% of the 76 total complaints filed for that model year.
Is there a transmission recall for the 2020 GMC Sierra 2500?: Yes. NHTSA lists two related recalls, campaign 26V083000 and campaign 24V797000, both addressing transmission control module or software issues on the 2020 Sierra 2500.
At what mileage do transmission problems show up on the 2020 Sierra 2500?: The median mileage at failure reported to NHTSA for this problem area is 114,000 miles.
Do these transmission complaints involve crashes or fires?: NHTSA data for this problem area on the 2020 Sierra 2500 shows 0 crashes, 0 fires, and 0 injuries reported.
Does the recall fix fix report on the software update?: One owner complaint stated the transmission still did not shift correctly after the recall software update and after two valve body replacements.