2020 Chevrolet Blazer Problems & Owner Complaints

Electrical System 71

“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 po…”
NHTSA complaint #11745859, 2026

“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 m…”
NHTSA complaint #11745865, 2026

“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, 2026

Power Train 71 2 injury

“I backed my vehicle out of the garage and put it in park and stepped out of the Driver's door. I was going to put my son in his car seat in the rear seat when the vehicle started moving backwards and the opened driver's door knocked us down. I was able to push my son out of the way, but the vehicle continued and the front left tire rolled over both of my legs. The vehicle continued in reverse along the driveway, struck a trash container and went up the incline at the main road. It crossed a busy two lane road and into my neighbors yard. The vehicle came to a stop about 10 feet from our ne…”
NHTSA complaint #11692355, 2025 · 1 injury(ies)

“The contact owns a 2020 Chevrolet Blazer. The contact stated that after driving into the garage, the engine was turned off but the transmission was left in the drive position. The contact mentioned that the brake was intended to engage in order for the vehicle not to move forward or backward. After exiting the vehicle moments later the vehicle began to roll backward out of the garage. The contact immediately attempted to stop the vehicle from rolling into the neighbor's home by grabbing the driver's side mirror. The contact was able to prevent the crash from occurring but in the process had su…”
NHTSA complaint #11470265, 2021 · 1 injury(ies)

“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 transmissio…”
NHTSA complaint #11749874, 2026

Engine 68 1 crash 2 injury

“6/12/2024 In Damon Parking lot in Rochester MN. Going less than 10 miles an hr- cars in front of me and behind me looking for a parking spot. Stop and go at times. Went to turn corner to go from one level to the next and my BLAZER took off "like a bullet". No control over accelerated speed- hit outer cement wall and slammed into 2 parked empty SUVS. Could not go any farther. The 2 SUVs slammed into cement wall in front of them. Injuries to both my passenger and myself. I have no idea what happened - it was so fast- I do know I had no control over accelerated rate causing accident. My 2020 Che…”
NHTSA complaint #11599228, 2024 · crash · 2 injury(ies)

“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, 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 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 po…”
NHTSA complaint #11745859, 2026

Unknown Or Other 54 1 crash 2 injury

“6/12/2024 In Damon Parking lot in Rochester MN. Going less than 10 miles an hr- cars in front of me and behind me looking for a parking spot. Stop and go at times. Went to turn corner to go from one level to the next and my BLAZER took off "like a bullet". No control over accelerated speed- hit outer cement wall and slammed into 2 parked empty SUVS. Could not go any farther. The 2 SUVs slammed into cement wall in front of them. Injuries to both my passenger and myself. I have no idea what happened - it was so fast- I do know I had no control over accelerated rate causing accident. My 2020 Che…”
NHTSA complaint #11599228, 2024 · crash · 2 injury(ies)

“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, 2026

“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, 2026

Steering 40

“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, 2026

“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, 2026

“The temperature gauge does not work, it stays at cold. The heater does not work unless the car is moving. AC does not blow cold air at all. I get a message that says “steering assist is reduced. Drive with care”. There are a lot of people online with the same complaints on these vehicles”
NHTSA complaint #11740247, 2026

Service Brakes 11 1 crash 1 injury

“I WAS DRIVING ABOUT 35MPH GOING STRAIGHT WHEN MY CHEVY BLAZER ACTED AS IF IT 'HIT A BRICK WALL' AND CAME TO A COMPLETE STOP. I GOT OUT AND NOTICED MY RIGHT, FRONT WHEEL WAS COMPLETELY SMASHED INTO MY CAR. SOMETHING HAD COME LOOSE INTERNALLY AND LOCKED UP MY WHEEL. IT DAMAGED MY CAR SO BAD WHERE MY SUSPENSION WAS DAMAGED. IT HAD TO BE TOWED. IT WAS NON DRIVABLE. MY VEHICLE ONLY HAD 1300 MILES ON IT. I DECIDED AT LAST MINUTE TO NOT GET ON HIGHWAY.”
NHTSA complaint #11373091, 2020 · crash · 1 injury(ies)

“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 transmissio…”
NHTSA complaint #11749874, 2026

“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, 2026

Lane Departure 5

“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 m…”
NHTSA complaint #11745865, 2026

“Ongoing Engine and Steering Sensor Issues – 2020 Chevrolet Blazer I am filing a complaint regarding repeated safety and mechanical issues with my 2020 Chevrolet Blazer. The vehicle’s check engine light frequently turns on and off, and I have been informed by technicians that it is related to the thermostat system. This issue negatively affects the vehicle’s performance and reliability. Additionally, the “Steering Assist is Reduced – Drive with Care” warning continues to appear while driving, even when weather and road conditions are normal. This error is reportedly due to a steering control…”
NHTSA complaint #11659624, 2025

“Continues "reduced steering assistance', thermostat won't register, stay on Cold, a/c blows warm air. We added coolant, replaced battery. Code goes off, within a few weeks comes back on. About to replace the whole thermostat and sensor. Many many blazers having the same issues.”
NHTSA complaint #11647032, 2024

Fuel/Propulsion System 4 1 crash 2 injury

“6/12/2024 In Damon Parking lot in Rochester MN. Going less than 10 miles an hr- cars in front of me and behind me looking for a parking spot. Stop and go at times. Went to turn corner to go from one level to the next and my BLAZER took off "like a bullet". No control over accelerated speed- hit outer cement wall and slammed into 2 parked empty SUVS. Could not go any farther. The 2 SUVs slammed into cement wall in front of them. Injuries to both my passenger and myself. I have no idea what happened - it was so fast- I do know I had no control over accelerated rate causing accident. My 2020 Che…”
NHTSA complaint #11599228, 2024 · crash · 2 injury(ies)

“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, 2026

“I received a check engine light which i took to Bell tire for diagnosis. Here is there diagnosis Comments: The P01F0 code on a 2020 Chevy Blazer means the engine coolant temperature is below the normal operating range, often due to a stuck-open thermostat (or both thermostats in models with dual units), a faulty Engine Coolant Temperature (ECT) sensor, or low coolant, leading to poor fuel economy and potential wear; fixing it usually involves replacing the thermostat(s) or sensor after checking coolant levels and wiring. After that i took the vehicle to GM Dealership. Even though this is a…”
NHTSA complaint #11715555, 2026

Suspension 4 1 crash 1 injury

“I WAS DRIVING ABOUT 35MPH GOING STRAIGHT WHEN MY CHEVY BLAZER ACTED AS IF IT 'HIT A BRICK WALL' AND CAME TO A COMPLETE STOP. I GOT OUT AND NOTICED MY RIGHT, FRONT WHEEL WAS COMPLETELY SMASHED INTO MY CAR. SOMETHING HAD COME LOOSE INTERNALLY AND LOCKED UP MY WHEEL. IT DAMAGED MY CAR SO BAD WHERE MY SUSPENSION WAS DAMAGED. IT HAD TO BE TOWED. IT WAS NON DRIVABLE. MY VEHICLE ONLY HAD 1300 MILES ON IT. I DECIDED AT LAST MINUTE TO NOT GET ON HIGHWAY.”
NHTSA complaint #11373091, 2020 · crash · 1 injury(ies)

“Very bad clunnk on driver side when hitting any bump on the road and it's loud.dealer ship sold me the car like that . Electrical issue gauge cluster radio cluster turn signals your first camera anything that works off the instrument cluster of the radio TV screen goes off while I'm driving comes back on hit a bump it comes back on no headlights driving at night time. The dealership sold me the car like this.”
NHTSA complaint #11710166, 2025

“1) Part that failed per General Motors Chevrolet dealer was the Thermostat along with Coolant Sensor. 2) I was getting warning notices on dash board screen stating (Reduced steering assist) I was also getting a ESC warning 3) Problem has been repaired at GM dealer 4) Parts were replaced by GM dealer/service center 5) ESC warning light that came on for a short time after motor stopped for auto stop / start and then restarted. If auto stop / start was turned off ESC warning did not come on. Reduced steering assist warning would come on but then go off. Finally the service engine light came on…”
NHTSA complaint #11709700, 2025

Vehicle Speed Control 4

“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…”
NHTSA complaint #11744808, 2025

“What component or system failed or malfunctioned, and is it available for inspection upon request? Multiple components in the engine timing and transmission system have failed. These include: Camshaft actuator solenoid valve failed twice (at ~30,000 and ~60,000 miles), each time with different DTC codes. Camshaft positioning sensor failed, triggering P0024 (“timing advanced and bouncing around”). Timing chain tensioner spring failed, requiring re-timing. Camshaft carrier case gasket experienced a major oil leak at 59,000 miles. Thermostat failed. Battery was replaced, but no diagnostic t…”
NHTSA complaint #11659014, 2022

“The vehicle drops to low gear without warning (check engine light comes on). Causing speed to drop to less than 20Mph max.”
NHTSA complaint #11496633, 2022

Air Bags 3 2 crash 2 injury

“Accident going about 50 mph and no airbags deployed”
NHTSA complaint #11696935, 2025 · crash · 1 injury(ies)

“The contact owns a 2020 Chevrolet Blazer. The contact stated that while driving at approximately 65 MPH when a semi-truck crashed into the rear of the vehicle on the driver's side of the vehicle. The vehicle began to spin, causing it to go into the lane the semi-truck was in, and it was hit on the driver's side of the vehicle several times. The vehicle ended up crashing into the median and coming to a stop. The air bags did not deploy. The contact received neck injuries, spinal injuries, headaches, consistent ringing of the ears, shoulder injuries, and hip injuries. Medical attention was neede…”
NHTSA complaint #11662080, 2024 · crash · 1 injury(ies)

“I'm having an issue with the airbag light keep coming on when I drive at times not safe.”
NHTSA complaint #11749470, 2026

Forward Collision Avoidance 3 1 injury

“I backed my vehicle out of the garage and put it in park and stepped out of the Driver's door. I was going to put my son in his car seat in the rear seat when the vehicle started moving backwards and the opened driver's door knocked us down. I was able to push my son out of the way, but the vehicle continued and the front left tire rolled over both of my legs. The vehicle continued in reverse along the driveway, struck a trash container and went up the incline at the main road. It crossed a busy two lane road and into my neighbors yard. The vehicle came to a stop about 10 feet from our ne…”
NHTSA complaint #11692355, 2025 · 1 injury(ies)

“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, 2026

“Thermostat is faulty at 55k miles. Purchased 2020 Blazer RS, certified used from Chevy in October 2023. Less than 1 yr later, thermostat is stuck on cold, no ax or heat, drivers assist reduced notice. Same issues as previous documented complaints. The frustration is why this known issue is not covered under warranty or recall! I just had my 50k maintenance service done while this issue was occurring- service told me “well we cleared the codes” , 2 days later check engine is on, temp stuck on cold, fan is over worked and no a/c or heat- and driver assist turns off. The safety issues around caus…”
NHTSA complaint #11620241, 2024

Tires 3

“This is for all four of the Continental Crosscontact LX Sport tires, size P 235/ 85 R18 with about 22,800 miles on them. These were the original tires that came with our 2020 Chevrolet Blazer. While driving on dry roads the car felt like it was on marbles, wanting to wiggle on the road. We took it to our locale Chevy dealership, they took a short look at the tires, and told us to have them replaced very soon. I started do research on new tires and also found out that Continental had put out a Voluntary tire recall there, this was for 93,959 of their passenger tires. But only certain mold dates…”
NHTSA complaint #11578178, 2023

“The tread-wear has been described by the service department as unusual and they have never seen a tire wear like this before. My safety and others safety is put at risk due to loss of tread causing traction to be lost on damp or wet roadways. The problem has been confirmed by the dealership service department. It has not been inspected by the manufacturer, but the tire company has been contacted. No warnings to the problem. 235/65r18 106h”
NHTSA complaint #11470002, 2022

“New 2020 Chevy Blazer AWD Premier with OEM Continental CrossContact LX Sport tires in size 265/45R21. Car has 18,000 miles on it and tires have been rotated and inflated correctly. All 4 tires have tread depth near 2/32 and need to be replaced per tire shop. Come to find out this Continental brand of tires has no treadlife warranty at all so they don't even believe in their product. How can Chevy and Continental be allowed to put this tire on new cars to rip off the consumer. I'm going to have to buy 4 new tires on a car that has 18,000 miles on it. This should not be happening. It's also a sa…”
NHTSA complaint #11442810, 2021

Wheels 3 1 crash 1 injury

“I WAS DRIVING ABOUT 35MPH GOING STRAIGHT WHEN MY CHEVY BLAZER ACTED AS IF IT 'HIT A BRICK WALL' AND CAME TO A COMPLETE STOP. I GOT OUT AND NOTICED MY RIGHT, FRONT WHEEL WAS COMPLETELY SMASHED INTO MY CAR. SOMETHING HAD COME LOOSE INTERNALLY AND LOCKED UP MY WHEEL. IT DAMAGED MY CAR SO BAD WHERE MY SUSPENSION WAS DAMAGED. IT HAD TO BE TOWED. IT WAS NON DRIVABLE. MY VEHICLE ONLY HAD 1300 MILES ON IT. I DECIDED AT LAST MINUTE TO NOT GET ON HIGHWAY.”
NHTSA complaint #11373091, 2020 · crash · 1 injury(ies)

“Questions Answered Below: What component or system failed or malfunctioned, and is it available for inspection upon request? The vehicle is at a GM Dealership now and is available for inspection. I have not authorized repairs as of yet. I am being told by the dealership: The ball joint on the control arm on the left side seized snapping the axle shaft - causing the tire to to turn out. The dealership has suggested: Mechanical repair costs $1,850, Plus an additional $2,000 due to wheel well damage caused by the failure. Has the problem been reproduced or confirmed by a dealer or independe…”
NHTSA complaint #11627354, 2024

“AFTER DRIVING THE VEHICLE FOR RANDOM PERIODS OF TIME AND AT RANDOM SPEEDS, ALL THE TPMS SENSORS WILL GIVE ALARMS AND THEN REGISTER AS DASHES ON THE DASHBOARD. IT GIVES ALARMS FOR EACH TIRE AS EACH TIRE GOES OUT UNTIL ALL OF THEM GO OUT. THEY WILL RESET AFTER A RANDOM PERIOD OF TIME AND START TO SHOW THE PRESSURE AGAIN.”
NHTSA complaint #11404794, 2021

Engine And Engine Cooling 2

“The contact owns a 2020 Chevrolet Blazer. The contact stated that while driving at an undisclosed speed, the steering wheel became inoperable. The contact stated that the steering wheel became difficult to turn with a reduced steering message displayed. The vehicle was taken to the dealer, where it was diagnosed that the thermostat had failed, which caused the steering wheel to fail, and needed to be replaced. The vehicle was not repaired. The manufacturer was made aware of the failure. The approximate failure mileage was 54,000.”
NHTSA complaint #11664630, 2025

“The contact owns a 2020 Chevrolet Blazer. The contact stated while driving at approximately 55 MPH and driving up an incline in the road, the check engine warning light had illuminated. The contact stated that the vehicle was shuddering. The contact stated that the failure only occurred while driving uphill. The contact had only recently taken the vehicle to a local dealer because the check engine warning light was illuminated. The vehicle was diagnosed, and the dealer determined that the thermostat and the engine control sensor needed to be replaced. The vehicle was repaired. The contact stat…”
NHTSA complaint #11661250, 2025

Exterior Lighting 1

“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, 2026

Fuel System 1

“The contact owns a 2020 Chevrolet Blazer. The contact stated that while refueling the vehicle, the contact removed the pump handle from the filler neck, and one of the fuel flappers detached. The contact was concerned about fuel leaking from the fuel tank. The vehicle was taken to the dealer, where it was diagnosed that the filler neck and fuel filler housing needed to be replaced; however, the fuel filler housing was on backorder. The vehicle was not repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 29,800.”
NHTSA complaint #11559855, 2023

Seat Belts 1

“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…”
NHTSA complaint #11744808, 2025

Seats 1 1 crash

“Got rear ended, the front right passenger seat bent backwards and torqued right.”
NHTSA complaint #11578776, 2024 · crash

Structure 1

“Component/System Involved: The shift-to-park sensor in my 2020 Chevy Blazer is malfunctioning. After shifting into park, the vehicle does not detect it and displays a “Shift to Park” message. The issue is ongoing, and the component is available for inspection if needed. Safety Risk: The vehicle cannot be fully shut off or locked, increasing the risk of battery drain or unintended movement. This poses a safety risk if the vehicle is left in public or on an incline. Inspection History: The vehicle has not been inspected Warning Signs: The “Shift to Park” message appears when trying to turn o…”
NHTSA complaint #11694202, 2024