2020 Chevrolet Blazer electrical system problems
78 complaints about electrical system have been filed for the 2020 Chevrolet Blazer, which is 21% of all its NHTSA complaints. It is the most reported problem area for this model year.
At a glance
- Complaints
- 78 21% of this year's complaints
- Crashes and fires
- 0 and 1
- Injuries and deaths
- 0 and 0
Source: NHTSA owner complaints
What the data shows
These complaints mention 1 fire.
What owners wrote
My 2020 Chevrolet Blazer experienced severe mechanical problems, including stuttering, loss of power, and the engine shutting off unexpectedly while I was driving. The vehicle subsequently would not operate normally. On February 25, 2026, Rick Hendrick Chevrolet Duluth performed a diagnostic inspection and recommended nearly $20,000 in repairs, including transmission-related repairs. However, the dealership did not identify or disclose any alternator fire damage or related electrical safety concerns.
The contact owns a 2020 Chevrolet Blazer. The contact stated upon shifting to park(P) and attempting to turn off the vehicle, the message that the transmission was not in park(P) was displayed. The contact stated that the failure recurred several times, and the vehicle responded as needed after several attempts. The dealer was not notified of the failure. The vehicle was not diagnosed or repaired. The manufacturer was notified of the failure, but no assistance was provided.
Other problems reported for the 2020 Chevrolet Blazer
- Drivetrain & axles 74 complaints
- Engine 74 complaints
- Steering 44 complaints