2018 GMC Yukon engine problems
27 owner complaints filed with NHTSA name the engine on the 2018 GMC Yukon — 39% of all complaints for this model year.
What owners report
“I started my vehicle and as I accelerated I started to hear a knocking noise. The vehicle and engine have been inspected by the dealership. The problem has also been confirmed by the dealership.There were no warning lights or messages before the knocking noise started.”
filed May 13, 2026
“The 2018 Yukon has been at the dealership several timeswaiting for a valve body for the transmission. There are valve body recalls for other year GM vehicles with the same transmission, but not for the 2018 model even though it appears to be the same part number. I don’t understand how this 2018…”
filed Apr 13, 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% |
| 2020 Yukon | 12 | 33% |
| 2019 Yukon | 28 | 52% |
| 2017 Yukon | 33 | 17% |
| 2016 Yukon | 34 | 13% |
| 2015 Yukon | 32 | 6% |
| 2014 Yukon | 8 | 14% |
Other reported problem areas on the 2018 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.