2025 GMC Sierra 1500 engine problems
52 owner complaints filed with NHTSA name the engine on the 2025 GMC Sierra 1500 — 45% of all complaints for this model year.
What owners report
“When updating the vehicle as prompted by the entrainment system the next day when attempting to start the vehicle it did not start. Vehicle had to be jumped then 6 warning lights came on and disappeared shortly after driving.”
filed Sep 9, 2026
“On XXX my 2025 gmc sierra 6.2L v8 engine experience catastrophic engine failure with no preexisting alerts or warnings. It was towed to Baglier gmc in [XXX] on XXX and is currently awaiting diagnostic evaluation. Upon restarting the vehicle after failure, the engine light did turn on. INFORMATION…”
filed Sep 8, 2026
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Engine problems in other Sierra 1500 years
| Year | Reports | Share |
|---|---|---|
| 2026 Sierra 1500 | 74 | 67% |
| 2024 Sierra 1500 | 180 | 51% |
| 2023 Sierra 1500 | 204 | 44% |
| 2022 Sierra 1500 | 236 | 40% |
| 2021 Sierra 1500 | 299 | 53% |
| 2020 Sierra 1500 | 231 | 50% |
| 2019 Sierra 1500 | 299 | 47% |
| 2018 Sierra 1500 | 65 | 22% |
| 2017 Sierra 1500 | 58 | 16% |
| 2016 Sierra 1500 | 38 | 11% |
| 2015 Sierra 1500 | 83 | 12% |
| 2014 Sierra 1500 | 69 | 9% |
Other reported problem areas on the 2025 GMC Sierra 1500
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.