2020 GMC Sierra 2500 engine problems
10 owner complaints filed with NHTSA name the engine on the 2020 GMC Sierra 2500 — 14% of all complaints for this model year.
What owners report
“The contact owns a 2020 GMC Sierra 2500. The contact stated while driving at an undisclosed speed, the accelerator pedal was depressed, and the transmission jerked. The contact stated that the transmission was skipping gear while shifting. The check engine warning light turned on and off. The…”
filed Jan 14, 2025
“Low coolant light keeps coming on and dealership checks and confirms coolant is not low. The end result is the sensor In the resivor is bad and requires the entire tank to be replaced rather than just the sensor”
filed Aug 29, 2023
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Engine problems in other Sierra 2500 years
| Year | Reports | Share |
|---|---|---|
| 2025 Sierra 2500 | 4 | 16% |
| 2024 Sierra 2500 | 9 | 9% |
| 2023 Sierra 2500 | 3 | 10% |
| 2022 Sierra 2500 | 4 | 10% |
| 2021 Sierra 2500 | 8 | 16% |
| 2019 Sierra 2500 | 6 | 19% |
| 2018 Sierra 2500 | 8 | 23% |
| 2017 Sierra 2500 | 6 | 16% |
| 2016 Sierra 2500 | 9 | 15% |
| 2015 Sierra 2500 | 7 | 8% |
| 2014 Sierra 2500 | 3 | 10% |
| 2013 Sierra 2500 | 1 | 2% |
Other reported problem areas on the 2020 GMC Sierra 2500
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.