2021 Chevrolet Blazer power train problems
18 owner complaints filed with NHTSA name the power train on the 2021 Chevrolet Blazer — 14% of all complaints for this model year.
What owners report
“The contact owns a 2021 Chevrolet Blazer. The contact stated that while driving at an undisclosed speed, the accelerator pedal was depressed, and the transmission was slipping gears before the vehicle lost motive power. The contact stated that the vehicle failed to drive forward or move while in…”
filed Jul 21, 2026
“The thermostat malfunctioned causing an error message regarding “steering assist is reduced”. When I parked and turned off, the engine fan continued to run. When car was restarted, the temp gauge inside was stuck at C. Took to dealership and they assessed. They repaired the thermostat under power…”
filed Jun 23, 2026
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Power Train problems in other Blazer years
| Year | Reports | Share |
|---|---|---|
| 2024 Blazer | 6 | 14% |
| 2023 Blazer | 10 | 25% |
| 2022 Blazer | 10 | 23% |
| 2020 Blazer | 71 | 34% |
| 2019 Blazer | 62 | 34% |
| 2004 Blazer | 4 | 8% |
| 2003 Blazer | 12 | 16% |
| 2002 Blazer | 33 | 13% |
| 2001 Blazer | 31 | 10% |
| 2000 Blazer | 84 | 14% |
| 1999 Blazer | 54 | 12% |
| 1998 Blazer | 74 | 10% |
Other reported problem areas on the 2021 Chevrolet Blazer
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.