2020 Chevrolet Blazer

220 complaints on file, page 1 of 11.

1. Filed Oct 1, 2026Failure Jul 10, 2026Chicago, ILEngine

   The radiator and thermostat on my 2020 Blazer had to be replaced at less than 35,000 miles. It was out of warranty and the Chevy dealer charged me $3,500 to replace them. Internet sources state that this is a common problem with this car. I complained to Chevy corporate and they refunded $1,000. I do not feel this was a fair settlement due to the fact that it is a common problem.

   NHTSA complaint 11768395
2. Filed Sep 21, 2026Failure Sep 20, 2026Springfield, MOSteering

   Power steering went out while driving making it impossible to steer.

   NHTSA complaint 11765762
3. Filed Sep 19, 2026Failure Sep 19, 2026Quakertown, PAElectrical system, Power train, Unknown or other

   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
4. Filed Sep 14, 2026Failure Sep 14, 2026Groveland, FLElectrical 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
5. Filed Sep 14, 2026Failure Sep 3, 2026119,000 milesSylvania, OHCatalytic convertor

   The contact owns a 2020 Chevrolet Blazer. The contact stated that while operating the vehicle, the check engine warning light intermittently illuminated, and the vehicle hesitated while accelerating. The vehicle was taken to the local dealer to be diagnosed, and the contact was informed that the catalytic converter needed to be replaced. The vehicle was not yet repaired. Additionally, while operating the vehicle, the engine temperature rose to HOT. The vehicle was taken to the local dealer, and the thermostat was replaced. The manufacturer was notified of the failure. The failure mileage was 119,000.

   NHTSA complaint 11764034
6. Filed Sep 11, 2026Failure Sep 4, 2026Crawfordsville, INUnknown or other

   The screen displayed shift to park. The car wouldn’t not recognize it was in park. Had to hit the shifter to get the car to recognize it was in park or it wouldn’t let you turn the car off. There was nothing other than the warning on the screen when we went to get gas and needed to turn the car off. It hasn’t been inspected by any of for this issue. I’m just afraid one day the car may roll if it doesn’t recognize it’s in park.

   NHTSA complaint 11763580
7. Filed Sep 10, 2026Failure Sep 10, 2026Troy, MIElectrical 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 "SHIFT TO PARK" warning message in the Driver Information Center (DIC). The vehicle continues to beep after the ignition is turned off. The vehicle does not fully power down, remaining in accessory/ON mode because the ETRS system has not received a valid Park confirmation signal from the shifter position sensor. This issue presents a potential Unintended Vehicle Motion (UVM) hazard for the following reasons: 1. Vehicle May Not Be Secured in Park The "SHIFT TO PARK" message indicates the ETRS system does not confirm the transmission is in the Park state. If the park pawl has not fully engaged — even though the shifter appears to be in Park — the vehicle is not mechanically secured. On any inclined surface, this creates a risk of the vehicle rolling away, potentially injuring the driver, bystanders, or causing property damage. 2. Driver May Exit Vehicle Believing It Is Secured The persistent beeping and DIC warning are intended to alert the driver that the vehicle is not in Park. However, customers may not understand the warning, may dismiss it, or may exit the vehicle assuming the shifter position is sufficient. This is a known human factors risk — the driver's perception of being in Park does not match the system's inability to confirm Park engagement. Vehicle Cannot Be Powered Off Normally: When the system cannot confirm Park, the vehicle remains in an active power state. This means the vehicle's propulsion system is not fully disabled, increasing the risk of unintended movement if the driver exit

   NHTSA complaint 11763452
8. Filed Aug 27, 2026Failure Aug 27, 2026Cumming, GAElectrical 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
9. Filed Aug 22, 2026Failure Jul 30, 2026Clarksville, TNElectrical system, Power train, Unknown or other

   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
10. Filed Jul 12, 2026Failure Apr 7, 2026Dorr, MIPower train, Service brakes

    Last year I was heading to heading to [XXX] in XXX when I pushed on the brakes on my 2020 Chevy blazer my brakes were working but the steering wheel was shaking weird like I was hard on the brakes but I was tapping them slowly earlier this year right before I had transmission flush at fox Chevy in Caledonia I noticed before two weeks of bringing it in I was near a traffic light slowing down it went hard shift down and when I was not moving in notice it jerked forward when at idle and the light like it was rear ended I feel like this is a safety concern of that happening after the transmission flush for two months after doing the acceleration is slipping I feel like there should be a recall for torque and transmission recalls for the 2020 Chevy blazers I really love this blazer owned for 4 years now I feel like it would be a safety for the public and nationwide INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

    NHTSA complaint 11749874
11. Filed Jul 10, 2026Failure Jul 8, 2026Wasilla, AKEngine, Service brakes, Steering

    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 thermostat needing replaced.

    NHTSA complaint 11749661
12. Filed Jul 10, 2026Failure Jul 8, 2026Garden City, MIAir bags

    I'm having an issue with the airbag light keep coming on when I drive at times not safe.

    NHTSA complaint 11749470
13. Filed Jun 23, 2026Failure May 20, 202665,000 milesNovi, MIElectrical system, Steering assist

    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 the “Special Coverage" for the repair. The contact was referred to the NHTSA Hotline to report the failure. The failure mileage was approximately 65,000.

    NHTSA complaint 11745865
14. Filed Jun 23, 2026Failure Mar 2, 2026Montpelier, INElectrical system, Engine

    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. This condition creates a safety concern because the steering assist warning indicates a potential reduction or loss of power steering assistance, which could increase steering effort and make the vehicle more difficult to control, particularly during low-speed maneuvers or emergency situations. The warning appears during normal vehicle operation and can distract the driver. The ongoing failure of multiple vehicle systems raises concerns about the safe and reliable operation of the vehicle. The problem has been present continuously since first appearing at approximately 40,000 miles and is fully reproducible. The condition occurs every time the vehicle is driven and has not corrected itself. Symptoms include the engine cooling fan running continuously, loss of air conditioning, and a steering assist warning message. Based on reports from other Chevrolet Blazer owners experiencing similar thermostat-related failures, this may represent a common defect that warrants investigation and consideration for a safety recall.

    NHTSA complaint 11745859
15. Filed Jun 17, 2026Failure Apr 6, 2026Andalusia, ALPower train

    I am submitting this complaint regarding the transmission in my 2020 Chevrolet Blazer. My vehicle has fewer than 100,000 miles and has experienced significant transmission failure symptoms, including hard shifting, jerking during acceleration, RPM fluctuations, slipping, loss of normal power, and inability to safely reach highway speeds. The vehicle struggles to accelerate properly and at times will not shift correctly into higher gears. Diagnostic trouble codes related to transmission operation have been present, including pressure control solenoid and transmission control faults. Repairs have already been attempted, including replacement of transmission-related components, but the transmission continues to malfunction. Through online owner groups, forums, and discussions with other Chevrolet Blazer owners, I have found numerous reports from owners experiencing similar transmission problems in 2019-2022 Chevrolet Blazers. Many owners report transmission slipping, harsh shifting, torque converter issues, valve body failures, pressure control solenoid failures, and complete transmission replacement at relatively low mileage. These failures create a serious safety concern because the vehicle may hesitate, lose power, fail to accelerate properly when entering traffic, or be unable to maintain safe highway speeds. Drivers and passengers are placed at risk when a vehicle cannot respond normally during merging, passing, or other traffic situations. Owners are frequently being quoted between $7,000 and $12,000 for transmission replacement or repair despite the vehicles being relatively new and often having less than 100,000 miles. Many consumers believe these failures indicate a widespread defect rather than normal wear and tear. I request that NHTSA investigate transmission failures in the 2020 Chevrolet Blazer and related model years to determine whether a manufacturing or design defect exists and whether a recall or other corrective action is warranted.

    NHTSA complaint 11744816
16. Filed Jun 17, 2026Failure Jun 11, 202575,000 milesPrattville, ALElectrical system, Seat belts, Vehicle speed 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 intermittently displayed a blank or distorted screen, became frozen and was unresponsive to the touch commands. The vehicle was not diagnosed or repaired. The manufacturer was not notified of the failures. The approximate failure mileage was 75,000.

    NHTSA complaint 11744808
17. Filed Jun 11, 2026Failure Jun 1, 2026Tacoma, WAPower train

    I am submitting this complaint regarding my 2020 Chevrolet Blazer and what appears to be a widespread cooling system defect. My vehicle has developed a coolant smell outside the vehicle, which raises concerns about a coolant leak from the radiator. After researching the issue, I discovered that numerous Chevrolet Blazer owners have reported similar coolant-related problems, including radiator failures, coolant leaks, and persistent coolant odors. These complaints are widely discussed across online forums, social media, and owner groups. General Motors appears to be aware of this recurring issue, yet many owners continue to experience failures within and outside of warranty coverage. The coolant smell is concerning because it may indicate a leak within the cooling system, which could lead to overheating, engine damage, loss of vehicle reliability, and potential safety risks while driving. Owners should not be experiencing major cooling system failures on relatively modern vehicles. I request that NHTSA investigate the cooling system and radiator issues affecting the 2020 Chevrolet Blazer and determine whether a defect exists that warrants a recall or other corrective action. The number of similar complaints suggests this may be a systemic issue rather than isolated incidents. General Motors should be held accountable for addressing this widespread problem and providing a permanent repair solution for affected owners. Thank you for your attention to this matter.

    NHTSA complaint 11743467
18. Filed Jun 11, 2026Failure Apr 6, 2026Onaway, MISteering, Unknown or other

    Engine temp gauge stops working causing the air to stop working and the cooling fan to rev to highest rpm. Also a warning that the steering assist is reduced. Eng check light comes on with a code P0208. This a known problem with an extended service # (N242484760) but only if your vin is listed. All vehicles with this problem should be covered. This seem to be a common problem, as my co-worker is having the same issue. This should be a recall as the steering is affected.

    NHTSA complaint 11743407
19. Filed Jun 5, 2026Failure May 29, 2026Hot Springs, AREngine, Warnings

    Engine temp gauge bottoms out because the thermostat is stuck open, causing the air to stop working. Also a warning that the steering assist is reduced. Eng check light comes on with a code P0208. This a known problem with an extended service # (N242484760) but only if your vin is listed. All vehicles with this problem should be covered

    NHTSA complaint 11742353
20. Filed Jun 3, 2026Failure May 29, 2026Harrison Twp, MIElectrical system, Unknown or other

    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