2021 GMC Sierra 1500 fuel/propulsion system problems
33 owner complaints filed with NHTSA name the fuel/propulsion system on the 2021 GMC Sierra 1500 — 6% of all complaints for this model year.
What owners report
“P1098 code indicating stuck/ unresponsive engine coolant control valve. N252508341 exists for this part; however claim is my VIN is not covered under the bulletin or included on any standard warranty coverage. Part should last more than 150k miles, vehicle less than 90k. Less than 2 weeks ago…”
filed Jul 16, 2026
“I am submitting supplemental evidence regarding my 2021 GMC Sierra (VIN [XXX]) for Recall Query RQ26001, Campaign 25V-274. Despite multiple repair attempts, my vehicle remains unsafe and non-compliant with GM Service Bulletin N252494002. The recall remedy was performed deficiently. [XXX] Northeast…”
filed Jul 14, 2026
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Fuel/propulsion System problems in other Sierra 1500 years
| Year | Reports | Share |
|---|---|---|
| 2026 Sierra 1500 | 4 | 6% |
| 2025 Sierra 1500 | 6 | 6% |
| 2024 Sierra 1500 | 17 | 5% |
| 2023 Sierra 1500 | 25 | 6% |
| 2022 Sierra 1500 | 21 | 4% |
| 2020 Sierra 1500 | 24 | 5% |
| 2019 Sierra 1500 | 21 | 3% |
| 2018 Sierra 1500 | 10 | 3% |
| 2017 Sierra 1500 | 7 | 2% |
| 2016 Sierra 1500 | 8 | 2% |
| 2015 Sierra 1500 | 13 | 2% |
| 2014 Sierra 1500 | 12 | 2% |
Other reported problem areas on the 2021 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.