2020 Chevrolet Blazer electrical system problems
71 owner complaints filed with NHTSA name the electrical system on the 2020 Chevrolet Blazer — 34% of all complaints for this model year.
What owners report
“The contact owns a 2020 Chevrolet Blazer. The contact stated that while driving approximately 70 MPH, the message, "Steering Assist Reduced - Drive Carefully” was displayed. The contact stated that the A/C shut off and the windshield defroster failed after the message was displayed. The vehicle was…”
filed Jun 23, 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.
Electrical System problems in other Blazer years
| Year | Reports | Share |
|---|---|---|
| 2025 Blazer | 7 | 27% |
| 2024 Blazer | 7 | 17% |
| 2023 Blazer | 6 | 15% |
| 2022 Blazer | 11 | 26% |
| 2021 Blazer | 37 | 30% |
| 2019 Blazer | 59 | 32% |
| 2006 Blazer | 2 | 11% |
| 2004 Blazer | 10 | 20% |
| 2003 Blazer | 9 | 12% |
| 2002 Blazer | 21 | 9% |
| 2001 Blazer | 40 | 12% |
| 2000 Blazer | 49 | 8% |
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.