2020 GMC Yukon XL power train problems
12 owner complaints filed with NHTSA name the power train on the 2020 GMC Yukon XL — 27% of all complaints for this model year.
What owners report
“Without any indications of a problem our transmission began making a loud whining noise. The evening before it was fine and the next morning on startup the noise just began. The Vehicle only has 45,000 miles on it and the transmission had been serviced at the recommend manufacturer interval. Took…”
filed Jun 28, 2026
“My 10 speed transmission on my 2020 Yukon XL Denali experienced a total failure. The vehicle will not move under its own power. General Motors has ZERO information on when a replacement Transmission will be available. Some info online shows it could be months. I am told that one dealership out of…”
filed Jan 18, 2026
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Power Train problems in other Yukon XL years
| Year | Reports | Share |
|---|---|---|
| 2026 Yukon XL | 1 | 5% |
| 2025 Yukon XL | 2 | 9% |
| 2024 Yukon XL | 10 | 16% |
| 2023 Yukon XL | 32 | 17% |
| 2022 Yukon XL | 27 | 18% |
| 2021 Yukon XL | 44 | 22% |
| 2019 Yukon XL | 13 | 20% |
| 2018 Yukon XL | 8 | 15% |
| 2017 Yukon XL | 34 | 24% |
| 2016 Yukon XL | 32 | 16% |
| 2015 Yukon XL | 35 | 11% |
| 2011 Yukon XL | 4 | 9% |
Other reported problem areas on the 2020 GMC Yukon XL
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.