2020 GMC Yukon engine problems
12 owner complaints filed with NHTSA name the engine on the 2020 GMC Yukon — 33% of all complaints for this model year.
What owners report
“We just purchased our Yukon from a dealership in February (2/7/26) and it was diagnosed with premature failure of at least one AFM valve lifter as it is causing engine misfires, shaking and stalling on 7/30/26. We just hit 67,000 miles on the odometer so we are just beyond the warranty coverage…”
filed Aug 23, 2026
“I took my vehicle to a dealer to repair something unrelated to the engine. They said the oil pan was leaking and pulled the pan to discover the crank shaft bearings were failing. The vehicle has 53,765 miles at this point. This appears to be the same defect being recalled on the 2022 through 2024…”
filed May 12, 2026
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Engine problems in other Yukon years
| Year | Reports | Share |
|---|---|---|
| 2026 Yukon | 28 | 76% |
| 2025 Yukon | 34 | 65% |
| 2024 Yukon | 71 | 69% |
| 2023 Yukon | 153 | 65% |
| 2022 Yukon | 107 | 60% |
| 2021 Yukon | 179 | 55% |
| 2019 Yukon | 28 | 52% |
| 2018 Yukon | 27 | 39% |
| 2017 Yukon | 33 | 17% |
| 2016 Yukon | 34 | 13% |
| 2015 Yukon | 32 | 6% |
| 2014 Yukon | 8 | 14% |
Other reported problem areas on the 2020 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.