2020 Chevrolet Blazer Owner Complaints

WITH APPROXIMATELY 1500 MILES ON THE VEHICLE, THE BLAZER'S AUTOMATIC TRANSMISSION FAILED WHILE DRIVING. I WAS STOPPED AT A RED LIGHT. WHEN THE LIGHT TURNED GREEN, I PROCEEDED SLOWLY THROUGH THE INTERSECTION IN A LEFT TURN. AS SOON AS I LEFT THE INTERSECTION, JUST AS THE VEHICLE WOULD TYPICALLY UP-SHIFT, THE RPM SPIKED, THE VEHICLE JOLTED FORWARD, AND THE CHECK ENGINE LIGHT CAME ON. AFTER THE INITIAL JOLT, THE VEHICLE WOULD NOT SHIFT OUT OF FIRST GEAR. I FOUND A SAFE PLACE TO PARK AND STOPPED THE ENGINE. UPON RESTARTING, THE ENGINE LIGHT REMAINED ON AND, THOUGH I COULD PUT THE CAR IN DRIVE, THE VEHICLE WOULD NOT SHIFT OUT OF FIRST GEAR. MOREOVER, WHEN I TRIED TO ENGAGE REVERSE, THE CAR REMAINED IN NEUTRAL. I HAD IT TOWED TO A CHEVROLET DEALERSHIP WHICH INFORMED ME GM HAS A BULLETIN ON THE TRANSMISSION REQUIRING TECHNICIANS NOT TO ATTEMPT TO REPAIR IT, BUT TO INSTALL A NEW TRANSMISSION.

8/7/2020

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 sustained injuries to the left shoulder, neck, and back and both the left and right hip and knees which required medical treatment. The cause of the failure was not determined. The local dealer was notified of the incident but no assistance was offered. The manufacturer was not notified. The failure mileage was 4,400

6/21/2022

TWICE WHILE I HAVE BEEN DRIVING THE INSTRUMENT PANEL WENT BLANK. IN MOTION.

1/26/2021

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.

3/25/2021

IN 2 OCCASIONS MY VEHICLE CAME TO A COMPLETE STOP AND TURNED OFF ON ME. I WAS THINKING IT WAS A SAFETY FEATURE BUT AFTER THE 2ND TIME I WAS CONCERNED. TOOK IT TO DEALERSHIP AND THEY FOUND NOTHING WRONG WITH IT. ON ANOTHER OCCASION I WAS LEAVING MY HOUSE WHEN MY STEERING WHEEL GOT SUPER HARD AND MADE IT VERY DIFFICULT FOR ME TO TURN THE WHEEL. TOOK IT TO DEALERSHIP AND THEY FOUND NOTHING WRONG, ACCORDING TO THEM TRUCK WAS PERFECTLY FINE.

3/30/2021

TL* THE CONTACT OWNS A 2020 CHEVROLET BLAZER. THE CONTACT STATED WHILE DRIVING 20 MPH, THE VEHICLE STARTED OVERHEATING. THE CONTACT THEN DROVE THE VEHICLE TO THE SIDE OF THE ROAD AND NOTICED THAT THE VEHICLE WAS LEAKING OIL. THE VEHICLE WAS THEN TOWED TO AN UNKNOWN DEALER. THE CONTACT STATED THAT SEVERAL UNKNOWN WARNING LIGHTS WERE ILLUMINATED. THE VEHICLE WAS TAKEN TO CHEVROLET OF COLUMBUS (2825 MERCHANT MILE, COLUMBUS, IN 47201) WHERE IT WAS DIAGNOSED WITH RODENT DAMAGE TO THE WIRING HARNESS. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER HAD BEEN INFORMED OF THE FAILURE AND INFORMED THE CONTACT THAT THE EXPENSES WOULD NOT BE COVERED EVEN THOUGH THE VEHICLE WAS UNDER WARRANTY. THE FAILURE MILEAGE WAS APPROXIMATELY 300.

3/30/2021

My retractable sunroof suddenly explosively broke. I was approaching a red stop light at low speed. I heard what I thought was a gunshot or vehicle backfiring. As I drove on, I heard wind whistling. I thought my passenger side window wasn’t closed. I lowered then jraised it. At that point, I heard my sunroof disintegrate. Luckily, the headliner kept the glass from raining down on me. If this had happened at highway speed, it could’ve been a real problem.

6/14/2022

On Tuesday August 9, 2022 at 0800, I dropped off my 2020 Blazer. I informed the staff that the seat base was not cooling as well as when I bought it, something is wrong with the transmission, and the screen keeps freezing. I was informed at that time by Amanda Carroll that it may take up to 72 hours to perform a diagnostic on the Blazer due to only one diagnostic tech at this time. The diagnostic had not been performed. We then told her that I had to return to work on Monday August 15th, can we get a loaner vehicle. We were told that due to the shortage in microchips, they did not have any vehicles available. “I am sorry”. We had not heard anything from anyone in regards to the status of the Blazer, so we went in person to the Service department on Saturday August 13, 2022 at 1130. My husband then asked about the status of the Blazer, was a diagnostic performed? She informed us, that a diagnostic was not performed. The only diagnostic tech called out, but he did come in on his day off to help. They know something is wrong with the Blazer, but were not able to perform the diagnostic. I then informed her that it has been over 96 hours since I dropped off the Blazer, and nothing had been done. I have to make a choice of driving a possibly dangerous vehicle or lose my job. But since a diagnostic was not performed, who knows what is wrong with the Blazer. I was informed from the BBB to contact Sean Jordan at All American Chevrolet of Killeen to discuss this matter. I contacted Mr. Jordan and we made arrangements to have the Blazer brought in on September 3rd at 0800. I took the Blazer into Chevrolet at 0800 and was informed by the employee, that I only had 45 miles until my warrantee was out. I told the staff employee, when I turned in the Blazer last month, I still had a warrantee and that Mr. Jordan would have to take care of that issue. Nothing was done and we left. I am out of characters to finish the complaint.

9/4/2022

IN 2 OCCASIONS MY VEHICLE CAME TO A COMPLETE STOP AND TURNED OFF ON ME. I WAS THINKING IT WAS A SAFETY FEATURE BUT AFTER THE 2ND TIME I WAS CONCERNED. TOOK IT TO DEALERSHIP AND THEY FOUND NOTHING WRONG WITH IT. ON ANOTHER OCCASION I WAS LEAVING MY HOUSE WHEN MY STEERING WHEEL GOT SUPER HARD AND MADE IT VERY DIFFICULT FOR ME TO TURN THE WHEEL. TOOK IT TO DEALERSHIP AND THEY FOUND NOTHING WRONG, ACCORDING TO THEM TRUCK WAS PERFECTLY FINE.

3/30/2021

REARVIEW CAMERA AND BACK UP CAMERA CONSTANTLY NOT FUNCTIONING AND GOING BLACK WHILE AND MOTION OR BACKING UP. CAR ACTS LIKE THERE IS SOMETHING IN FRONT OF IT (LIKE A WALL) ON CERTAIN ROADS AND DOES NOT WANT TO ACCELERATE TO TURN/PULL OUT FROM A STOPPED POSITION. I HAVE HAD THIS VEHICLE FOR 2 MONTHS. I HAVE HAD A CAR PRIOR TO THIS THAT DID THIS BEFORE AND STOPPED AND LEFT ME STRANDED ON A BUSY ROAD AND CAUSED AN ACCIDENT. I CAN'T BELIEVE THIS CAR IS ACTING LIKE THIS!

5/3/2021

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.

11/4/2020

REARVIEW CAMERA AND BACK UP CAMERA CONSTANTLY NOT FUNCTIONING AND GOING BLACK WHILE AND MOTION OR BACKING UP. CAR ACTS LIKE THERE IS SOMETHING IN FRONT OF IT (LIKE A WALL) ON CERTAIN ROADS AND DOES NOT WANT TO ACCELERATE TO TURN/PULL OUT FROM A STOPPED POSITION. I HAVE HAD THIS VEHICLE FOR 2 MONTHS. I HAVE HAD A CAR PRIOR TO THIS THAT DID THIS BEFORE AND STOPPED AND LEFT ME STRANDED ON A BUSY ROAD AND CAUSED AN ACCIDENT. I CAN'T BELIEVE THIS CAR IS ACTING LIKE THIS!

5/3/2021

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.

11/4/2020

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.

3/25/2021

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 safety concern for others on the road that aren't aware they need to check their tire tread depth so soon with these tires.

12/6/2021

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

6/19/2022

The service advisor at the Chevrolet dealership denied a repair to my abs control module because it was a “known issue”. He told my wife and I our car is unsafe to drive And still wants to give it back to us. Other Gm vehicles have recalls open for the same issue one needs to be open for this. Abs lights and multiple others no brakes or random braking.

2/22/2022

The vehicle drops to low gear without warning (check engine light comes on). Causing speed to drop to less than 20Mph max.

12/8/2022

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.

11/4/2020

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 independent service center? 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. How was your safety or the safety of others put at risk? Due to my slow speed turning out of the parking lot ~10 mph - the vehicle came to a sudden halt. However, had this occurred while driving any faster - it would have been very dangerous and put myself and others at significant risk. Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? It was towed by AAA and has been inspected by the GM Dealership. That is the only inspection thus far. Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear? Earlier in the day while pulling out of a parking spot and turning the wheel to the left I thought I felt some type of resistance then it went away as I started driving. No other symptoms or warning prior to the failure.

11/25/2024

Esc message on dashboard & all wheel drive disabled & lane assist traction control liggt turns on & parking brake light turns on while driving caused for my electric component to act all crazy including my sunroof I’ve been in the dealer over over try to fix it and that is concerning reason for my safety while u are driving and all those lights come on And yes I have took it to the dealer multiple times to fix this situation And yes the vehicle has been inspected by the manufacturer And yes it has happen before i have a 1 year with the car the problem first came about couple month after I got the car and been having problem since then I bought the car 5/13/23

6/6/2024

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.

3/7/2025

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 Chevy Blazer was totaled- It was inspected by American National Insurance CO. Absolutely no warnings. Police report did not include any witness. Blazer is in the hands of the Insurance Co. Chevy Blazer took off like a bullet - could not stop it!!Police report 24026393 Rochester Police Dept Unable to upload . Checked no police report below so I could continue report.

7/5/2024

To Whom It May Concern, I am writing to formally file a complaint regarding ongoing and persistent issues with my 2020 Chevrolet Blazer. The vehicle has exhibited repeated problems that I believe may indicate a broader safety or mechanical defect, and I am requesting that the NHTSA investigate these concerns further. Since purchasing the vehicle, I have experienced the check engine light turning on and off repeatedly, without consistent resolution. The following issues have occurred over time, all seemingly related to the engine or control systems: Engine Cooling System Failure: The first major issue involved the engine cooling system. This caused the vehicle to overheat and required service. I was concerned about the potential for engine damage or fire risk due to excessive heat. Variable Valve Timing (VVT) System Malfunction: Shortly after the cooling system issue, the vehicle began experiencing problems with the variable valve timing system. This not only affected performance and fuel efficiency but also caused the check engine light to illuminate again. Steering Control Assist Sensor Warnings: Most recently, the steering control assist sensor has started to malfunction, with warnings frequently popping up on the dashboard. This has impacted steering feel and raises serious safety concerns. Despite multiple service appointments and repairs, these problems persist or reappear. This cycle of temporary fixes without a lasting resolution is both frustrating and concerning from a safety standpoint. I am requesting that the NHTSA look into whether these recurring engine and control system issues are part of a known defect or recall-worthy problem affecting the 2020 Chevy Blazer. Thank you for your attention to this matter.

5/12/2025

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 stated that approximately 1,800 miles after the first repair, the check engine warning was illuminated again. The vehicle was taken back to the same dealer. The vehicle was diagnosed, and it was determined that the air flow shutters had been damaged and needed to be replaced. The vehicle was not repaired. The manufacturer was informed of the failure and had referred the contact to the NHTSA Hotline to report the failure. The failure mileage was approximately 97,000.

5/15/2025

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.

6/3/2025

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.

12/13/2023

Got rear ended, the front right passenger seat bent backwards and torqued right.

3/21/2024

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 causing more engine damage by improper cooling and reduction of driving assistance. Additionally, parking issue with vehicle not recognizing it’s in park and having to wiggle or jam the shifter- car drains battery and won’t lock until resolved. Car is took expensive to have a $1200 replacement not covered under warranty!

10/16/2024

The contact owns a 2020 Chevrolet Blazer. The contact stated that upon reaching the destination and shifting the vehicle into park, a warning message displayed reading "Please shift to Park." After, the contact observed that he was unable to switch the vehicle off. No warning lights were illuminated. The vehicle was not taken to the dealer or an independent mechanic. The vehicle was not repaired. The manufacturer was notified of the failure and referred the contact to the NHTSA Hotline for assistance. The failure mileage was 128,000.

1/7/2025

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 assist sensor, and it raises serious concerns about the safety and handling of the vehicle. The alert causes uncertainty and could potentially impact the power steering functionality, creating a hazardous driving situation. These issues have occurred multiple times despite maintenance, and they appear to be part of a broader pattern of defects affecting other owners of this model year. It is unacceptable for a vehicle this new to have persistent problems that affect both engine operation and steering safety. I urge the NHTSA to investigate these recurring issues with the 2020 Chevy Blazer’s thermostat system and steering assist sensor to determine whether a recall or manufacturer intervention is warranted. Safety should not be compromised due to what seems to be systemic defects. Thank you for your attention to this matter.

5/7/2025

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 needed. A police report was filed. The vehicle was towed and taken to the dealer, who repaired the driver's side doors, tires, rims, and other parts of the body of the vehicle that the contact was unable to identify. The air bag failure was not diagnosed or repaired. The manufacturer was made aware of the failure and opened a case. The failure mileage was approximately 72,000.

5/20/2025

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 neighbor's house without striking anything else. We purchased this car used with just under 300 mile on it. During the time that we've owned it, it has randomly flashed a "Shift to Park" warning lamp on the dash when I shift it to park and turn it off. It has never done what happened to me today. A few months ago, my husband and I took the car to the GM dealership to have it checked out before the warranty expired. We told them about the "Shift to Park" warning lamp and that the car was shifting hard while driving it. They kept the car a few days and told us they were unable to find anything wrong with it.

10/9/2025

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 off the vehicle, despite the gear being in park. This started around Fall 2024 and has occurred regularly since.

10/17/2025