2020 Chevrolet Blazer electrical system problems

Related recalls

No recalls on file.

What owners say

1. Filed Sep 19, 2026PAElectrical SystemOther / UnknownTransmission & Drivetrain

   This happened back in May and the dealership couldn’t find anything wrong and it happened again today. I am driving and the car will shut off. A message pops up saying shift to neutral and press start again. It’s very dangerous and frustrating.

   NHTSA complaint #11765573 · source
2. Filed Sep 14, 2026FLElectrical System

   The contact owns a 2020 Chevrolet Blazer. The contact stated that while starting the vehicle, the brake pedal became inoperable. There was no warning light illuminated. The contact stated that excessive force was needed to depress the brake pedal to engage the START/STOP function to start the vehicle. The dealer was not contacted. The manufacturer was made aware of the failure by telephone.

   NHTSA complaint #11764039 · source
3. Filed Sep 10, 2026MIElectrical System

   Vehicle: 2020 Chevrolet Blazer V6 System: Electronic Transmission Range Select (ETRS) – Gear Shifter / Park Engagement Concern Type: Potential Unintended Vehicle Motion / Failure to Confirm Park State Description of the Issue On the 2020 Chevrolet Blazer V6, the Electronic Transmission Range Select (ETRS) system fails to confirm that the transmission is in Park, even when the physical gear shifter lever is placed in the Park position. As a result The dashboard displays a…

   NHTSA complaint #11763452 · source
4. Filed Aug 27, 2026GAElectrical System

   Car is in park but the car alerts that it is not in park ( causing radio and light s to stay on ) - happens continually and from what I have heard from other people and mechanics - this is a known issue with Chevy

   NHTSA complaint #11759904 · source
5. Filed Aug 22, 2026TNElectrical SystemOther / UnknownTransmission & Drivetrain

   The car is not sensing that it is in park when it is. When I place it in park and turn the car off it dings and says shift into park however it already is in park. Therefore the car will not turn off. I had to jiggle the shift or turn the car on, reverse then go forward then park to get it to register. This has taken up to 10 minutes and it’s getting worse. This is a known issue that is referenced in GM Technical Service Bulletin 19-NA-206.

   NHTSA complaint #11758760 · source
6. Filed Jun 23, 202665,000 miMIDriver Assistance & Safety TechElectrical System

   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 taken to the dealer, and the contact was informed that the repair was not covered. The manufacturer was informed of the failure and confirmed that the vehicle was not included in…

   NHTSA complaint #11745865 · source
7. Filed Jun 23, 2026INElectrical SystemEngine

   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 functioning properly and the vehicle began displaying a warning message indicating that steering assist is unavailable or reduced. The vehicle is available for inspection upon request.…

   NHTSA complaint #11745859 · source
8. Filed Jun 17, 202675,000 miALElectrical SystemSeats & Seat BeltsAcceleration & Cruise Control

   The contact owns a 2020 Chevrolet Blazer. The contact stated that the front passenger’s seat belt buckle was inoperable. The contact buckle was jammed and failed to properly secure the seat belt in place. The contact stated that while driving and stopped at a red light, the traffic light turned green and the accelerator pedal was depressed; however, the vehicle surged forward unexpectedly while rolling. Additionally, the contact stated that the infotainment system…

   NHTSA complaint #11744808 · source
9. Filed Jun 3, 2026MIElectrical SystemOther / Unknown

   This is what came up on my screen.Steering wheel assist reduced.Drive with care. My hot and cold gauge drop to C and stayed there for about 4 days and my a/c was blowing out hot air. I was told a lot of these Suvs have done this.

   NHTSA complaint #11741925 · source
10. Filed May 17, 2026ILBrakesElectrical SystemOther / Unknown

    Vehicle: 2020 Chevrolet Blazer Issue: “Shift to Park” malfunction Description: The vehicle repeatedly displays a “Shift to Park” warning message even when the gear selector is fully placed in Park. Because of this issue, the vehicle does not always shut off properly and may continue running electrical systems after the engine is turned off. Symptoms include: * Warning message stating “Shift to Park” * Vehicle not recognizing that it is in Park * Difficulty shutting vehicle…

    NHTSA complaint #11738429 · source
11. Filed May 11, 2026FLElectrical SystemSteering

    I am contacting you regarding my 2020 Chevy Blazer with approx $55,580 Miles. the vehicle is experiencing multiple issues consistent with the know thermostat problem reported on many 2020 Blazer, including the P0128 code, cooling fans running at high speed and "steering Assist Reduced" warnings. The Steering wheel has now become hard to turn while driving, creating a serious safety concern for me and my family, I m [XXX] old and yesterday in mother's day) while I was driving…

    NHTSA complaint #11737156 · source
12. Filed May 3, 2026INElectrical SystemFuel, Hybrid & EV PropulsionLighting

    My car will be running fine but the lights on the AC panel wont work. My car will stop and shut down while driving. Ive taken it in for service and they told me my battery cabels were lose. The second time it happened I got a notification of low battery level and it shut off and will not start. I just replace the battery 2 years ago. The service department tested my battery and said it was fine

    NHTSA complaint #11735381 · source

Source: U.S. National Highway Traffic Safety Administration (NHTSA) Office of Defects Investigation public data. Complaints are submitted by owners and are not verified by NHTSA or by us; a complaint does not prove a defect exists. View this vehicle on NHTSA.gov Methodology