Chevrolet Blazer Complaints (2020)

224 consumer complaints on file.

#11704538December 11, 2025
POWER TRAIN
The contact owns a 2020 Chevrolet Blazer. The contact stated that while driving at an undisclosed speed, the vehicle hesitated with a grinding sound coming from the vehicle, with the check engine warning light illuminated. The contact stated that the vehicle was jerking while driving and while accelerating from a stop. In addition, the contact noticed fuel leaking from the front end of the vehicle while the vehicle was parked at the residence. The vehicle was taken to the dealer, where it was diagnosed that the START/STOP accumulator end cap had failed and needed to be replaced. The vehicle was not repaired. The manufacturer was made aware of the failure and referred the contact to the NHTSA Hotline for assistance. The approximate failure mileage was 157,236.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11704477December 11, 2025
ENGINE
Thermostat/thermostat sensor and complete water outlet system replacement at only 52,377 miles. The defective part was located under the Intake Manifold requiring its removal, excessive labor cost for the repair, and potential future engine issues due to exposed/open head gasket for the repair.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11702406December 2, 2025
POWER TRAIN, SERVICE BRAKES, HYDRAULIC
The contact owns a 2020 Chevrolet Blazer. The contact stated that while attempting to start the vehicle, the brake pedal was depressed, but the pedal was firm, and the contact was unable to start the vehicle. The vehicle was towed to the dealer, where an unknown repair was performed. Additionally, the contact stated that upon taking the vehicle for an oil change, the contact was informed that the service could not be performed because the rear main seal was defective. The vehicle was taken to the dealer, where the contact was informed that the rear main seal was in good condition. The dealer informed the contact that the transmission had failed and that there was a hole in the transmission. The dealer repaired the transmission. The contact related the failure to NHTSA Campaign Number: 20V668000 (Power Train). The manufacturer was notified of the failure, but no assistance was provided. The failure mileage was approximately 80,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11700067November 18, 2025
POWER TRAIN
Steering assist reduced message followed by check engine light came on and temperature gauge not moving from cold. Immediately took it to the dealership Hiley Chevrolet in Rockwall, TX. After $250 for diagnostic, failed thermostat is the cause and $1216 repair cost. Known issue that Chevrolet issued special coverage for 2021 Blazers, but none for 2020. My vehicle has a little more than 51,970 miles. Same vehicle just had battery replaced two weeks ago at same dealership and no other issues showed up during diagnostic then.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11697619November 5, 2025
LANE DEPARTURE: BLIND SPOT DETECTION, UNKNOWN OR OTHER
Back up camera quit workingsometime ago.I took it to dealership.Fix did not last long.Out again.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11696935November 1, 2025
AIR BAGS
Accident going about 50 mph and no airbags deployed
Crash:
Yes
Fire:
No
Injuries:
1
Deaths:
0
#11696724October 31, 2025
ELECTRICAL SYSTEM, STEERING
Thermostat gauge isnt moving along side a message saying "Steering assis is reduced drive with care"
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11696573October 30, 2025
ENGINE
2020 Chevrolet Blazer, 19900 miles, lightly driven The radiator seam is leaking coolant, which appears to be a known issue as there are numerous complaints on various websites and forums. The vehicle is now unreliable due to an overheating risk.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11696282October 29, 2025
ELECTRICAL SYSTEM
I got into my vehicle and it said “steering assist reduced. Drive with care”. the A/C stops working and refuses to cool as well as the cooled seats. The thermostat for the coolant reads “C” despite driving it 40+ miles in 83 degree weather. Tried disconnecting battery upon research and finding out many other people are having the same problem. The light turned off and came right back on the following morning
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11695572October 25, 2025
SERVICE BRAKES, ELECTRICAL SYSTEM, UNKNOWN OR OTHER
Shift to park issue. Vehicle shifts into park but does not register as such. Therefore, the vehicle keeps running and will not turn off or allow you to exist the vehicle. This is already a know issue with certain GM vehicles as is evident by a recall and Service Bulletins. However, none of those include the 2020 Chevy Blazer.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11694201October 17, 2025
POWER TRAIN
Received Error code P0021 "A" camshaft position timing is over-advanced in Bank 2 of the engine" Occured 3 times before taking it into dealer. Chevrolet dealership agreed and it was covered under powertrain warranty.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11694202October 17, 2025
ELECTRICAL SYSTEM, POWER TRAIN, STRUCTURE:BODY
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.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11694205October 17, 2025
STEERING, ELECTRICAL SYSTEM
Component/System Involved: The electric power steering system in my 2020 Chevy Blazer is malfunctioning. A warning appears on the dashboard: “Steering Assist is Reduced – Drive with Care.” When this happens, steering becomes very stiff and difficult. The issue is ongoing, and the component is available for inspection if requested. Safety Risk: This creates a serious safety hazard. The sudden loss of steering assist makes it hard to turn the wheel, especially at low speeds or when maneuvering. It puts me and others at risk, especially if it happens in traffic or while turning. Problem Confirmed by Dealer: No, the issue has not yet been inspected or confirmed by a dealer or service center. Inspection History: The vehicle has not been inspected by a dealership, manufacturer, police, or insurance. Warning Signs: The only warning is the “Steering Assist is Reduced – Drive with Care” message, which appears randomly—sometimes at startup, sometimes while driving. The issue began around 10/15/2024 and continues to be an on going issue.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11693643October 15, 2025
ELECTRICAL SYSTEM, SERVICE BRAKES, UNKNOWN OR OTHER
When I try to park the car, it says shift to park. Sometimes I can’t get the car to go into park to exit the vehicle or other times. I’ve shut the door and it has stayed on with the accessories because it won’t shut off
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11693665October 15, 2025
ELECTRICAL SYSTEM
Shift to park message on display when car is already in park, preventing the car from turning off completely draining the battery completely.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11693039October 13, 2025
ELECTRICAL SYSTEM, ENGINE
Warning message indicating steering assist system reduced, engine fan running non-stop, AC blowing hot air, temperature gauge not registering/stuck on cold. Faulty engine temperature sensor and thermostat.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11693175October 13, 2025
ENGINE, STEERING
"Steering Assist Reduced” warning message appears on dashboard display and temperature gauge stuck on cold on the dashboard display. I understand this such a common issue with the 2019 and 2020 Blazer that General Motors has issued Technical Service Bulletins but refuses to repair these vehicles for free. This is unacceptable! Issue a mandatory recall therefore GM must perform the repairs for free.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11692355October 9, 2025
POWER TRAIN, FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING
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.
Crash:
No
Fire:
No
Injuries:
1
Deaths:
0
#11692227October 8, 2025
ENGINE
Engine light on, power steering assist, air conditioning stop working diagnostic tool read p0128 coolant thermostat
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11691458October 5, 2025
UNKNOWN OR OTHER
Similar to the Bulletin No.: PIP5681C The flex pipe bracket is cracked on my 2020 chevy blazer this causes rattling and whining noises due to the part rubbing against where it was previously connected.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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