2020 Chevrolet Blazer engine problems
68 owner complaints filed with NHTSA name the engine on the 2020 Chevrolet Blazer — 32% of all complaints for this model year.
What owners report
“I was driving and steering reduced drive with caution notification and brake assist notification came on and then engine light and the temp gage went to cold and stayed there. My steering stiffened up making it hard to steer. This is a known problem with the Chevy blazers and it had to do with the…”
filed Jul 10, 2026
“The vehicle experiences a constant cooling system failure that appears to be related to the thermostat. Beginning at approximately 40,000 miles, the engine cooling fan started running continuously at high speed whenever the vehicle is operating. At the same time, the air conditioning stopped…”
filed Jun 23, 2026
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Engine problems in other Blazer years
| Year | Reports | Share |
|---|---|---|
| 2025 Blazer | 3 | 12% |
| 2024 Blazer | 6 | 14% |
| 2023 Blazer | 12 | 30% |
| 2022 Blazer | 13 | 30% |
| 2021 Blazer | 36 | 29% |
| 2019 Blazer | 38 | 21% |
| 2006 Blazer | 2 | 11% |
| 2002 Blazer | 3 | 1% |
| 2000 Blazer | 1 | 0% |
| 1999 Blazer | 2 | 0% |
| 1998 Blazer | 2 | 0% |
| 1996 Blazer | 1 | 0% |
Other reported problem areas on the 2020 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.