2020 Chevrolet Silverado 2500 engine problems
10 owner complaints filed with NHTSA name the engine on the 2020 Chevrolet Silverado 2500 — 10% of all complaints for this model year.
What owners report
“2020 3.0 diesel duramax sucked in the antifreeze and caused a hydrolock. The dealer says that it is not covered under warranty since the engine was over 100k miles. They did offer a new engine for $30K which I declined. The truck was always well taken care of and only received the best in all…”
filed May 14, 2026
“The contact owns a 2020 Chevrolet Silverado 2500. The contact stated that while driving approximately 45 MPH, the check engine warning light illuminated. The vehicle was taken to the residence. The vehicle was then taken to a dealer, and DTC: P133X (Cylinder X Glow Plug Failure) was retrieved. The…”
filed Feb 17, 2026
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Engine problems in other Silverado 2500 years
| Year | Reports | Share |
|---|---|---|
| 2025 Silverado 2500 | 5 | 23% |
| 2024 Silverado 2500 | 13 | 9% |
| 2023 Silverado 2500 | 7 | 16% |
| 2022 Silverado 2500 | 5 | 6% |
| 2021 Silverado 2500 | 7 | 8% |
| 2019 Silverado 2500 | 19 | 26% |
| 2018 Silverado 2500 | 12 | 23% |
| 2017 Silverado 2500 | 12 | 22% |
| 2016 Silverado 2500 | 8 | 7% |
| 2015 Silverado 2500 | 12 | 7% |
| 2014 Silverado 2500 | 7 | 18% |
| 2013 Silverado 2500 | 6 | 12% |
Other reported problem areas on the 2020 Chevrolet Silverado 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.