2021 GMC Yukon power train problems
51 owner complaints filed with NHTSA name the power train on the 2021 GMC Yukon — 16% of all complaints for this model year.
What owners report
“The contact owns a 2021 GMC Yukon. The contact stated that while driving at various speeds on several occasions, the vehicle jerked and the transmission shifted hard into 1st and 2nd gears. The message "Service Safety Restraint" was displayed. The vehicle was taken to an independent mechanic, where…”
filed Sep 15, 2026
“Had a valve body failure in mid XXX. The vehicle would not go into reverse and drove it in limp mode to a dealership about 5 miles away. Fortunately they were able to get a new valve body and repair it in one day. Cost was approximately $3,500 and not covered by warranty. The vehicle had about…”
filed Sep 10, 2026
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Related recalls
- Transmission control valve may fail and cause the rear wheels to lock-upCampaign 24V797000 · Oct 24, 2024
- Rear wheel driveshaft assemblies may have internal components that were not heat-treated…Campaign 22V036000 · Jan 27, 2022
Power Train problems in other Yukon years
| Year | Reports | Share |
|---|---|---|
| 2026 Yukon | 10 | 27% |
| 2025 Yukon | 6 | 12% |
| 2024 Yukon | 13 | 13% |
| 2023 Yukon | 43 | 18% |
| 2022 Yukon | 29 | 16% |
| 2020 Yukon | 14 | 39% |
| 2019 Yukon | 12 | 22% |
| 2018 Yukon | 18 | 26% |
| 2017 Yukon | 48 | 24% |
| 2016 Yukon | 34 | 13% |
| 2015 Yukon | 46 | 9% |
| 2014 Yukon | 3 | 5% |
Other reported problem areas on the 2021 GMC Yukon
Counts are unique NHTSA complaints naming this component group. Complaints are unverified owner reports; mileage is computed only from complaints that included a usable odometer reading.