59 problems related to electrical system have been reported for the 2020 Chevrolet Blazer. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2020 Chevrolet Blazer based on all problems reported for the 2020 Blazer.
My vehicle has been throwing an error code related to the thermostat. The temperature gauge will remain on c resulting in the fan running loudly, the air conditioner not cooling the cabin of the vehicle well, and a message displaying "steering assist is reduced drive with care". When I check the fluid levels everything is fine without issue. I'm very frustrated and want to get rid of my Blazer ASAP.
When I parked and tried to turn off car it would continue to run. I had to put it in park and drive back to park several times before car would turn off. There’s a recall for this issue on other Blazers and I feel 2020 Blazers should be included. The dealer replaced the shifter assembly, cleared otc.
We have experienced 2 issues that are very well known issues, I will list them here. First, is the shift to park issue, that involves an electrical switch and wiring harness on the shifter assembly. Second, is regarding a "driver assist reduced drive with care" alert message that includes diagnostic trouble code (dtc) p0128, but is actually related to either the engine cooling sensor or the cooling thermostat housing assembly. Both issues are very well known, and many owners have had these issues.
I am getting the message "shift to park" displayed while vehicle in park after turning the vehicle off. Looking online, it seems to be a common issue with Blazers as well as other gm vehicles. I found online that "the cause of the condition may be that the park switch in the transmission control (shifter) assembly is not pulling the bcm signal low to electronically show that the vehicle is in the park position. " if this is such a common issue on similar vehicle to mine since 2018 it appears, why is this not a recall already?!.
When you shift it into park, it often doesn’t recognize that it’s in park and begins to roll backwards. This doesn’t happen every single time but at least twice a week and I have to use the parking break.
The original issue was that the temperature gauge was pegged on cold and the a/c was inoperative. The vehicle’s fans would run continuously even when the engine was cold. This created a safety concern since the engine’s actual temperature could not be monitored, and loss of a/c affected drivability in hot conditions. The issue appears related to the engine’s coolant temperature sensor or thermostat system, which causes incorrect signals to the temperature gauge and hvac system. The condition has been reported by multiple owners of the 2020 chevy Blazer 3. 6l. In my case, the malfunction happened suddenly and has been repeatable. There were no prior warning lamps until the issue occurred, at which point the temperature gauge stopped working properly and the air conditioning failed.
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.
Car is cutting off while driving , I’m driving on a busy road , engine jerks and stall out leaving me with no power to accelerate. Brakes work but gas pedal not so much . I have to cut off the car hoping it turns on , cause it don’t want to turn over once I decide to turn it off.
When I put the car in park it does not register and will not come out of accessory more. This is a known issue and gm is making customers out of warranty pay for it.
Vehicle keeps throwing “steering assistance reduced please drive with care” message. It causes my car fan to constantly run. It also causes the coolant gauge to not work the needle drops below that cool like it’s not on and then the car won’t blow cold air from the vents. This message tells me that something could be wrong with the steering which puts my safety at risk. This issue has been happening to me on and off for months now and there are multiple complaints of multiple chevy owners having the same problem this issue needs to be addressed.
On multiple occasions, my 2020 Chevrolet Blazer rs has failed to recognize when it is shifted into the "park" gear. When this occurs, a "shift to park" message appears on the dashboard, and the vehicle's electronics will not shut down, preventing me from turning off and locking the vehicle. This defect presents several critical safety hazards: inability to secure vehicle: the engine/electronics remain active, preventing the vehicle from being turned off and secured. This could drain the battery, leaving me stranded, or make the vehicle a target for theft. Driver distraction: the warning message has appeared randomly while the vehicle is in motion, creating a serious and unexpected distraction for the driver. Potential rollaway risk: this failure in the system that confirms the vehicle is in park could lead a driver to exit the vehicle believing it is secure when it is not, creating a potential for a vehicle rollaway. On 05/02/2024, I had the vehicle serviced for this specific issue. The dealer replaced the transmission shifter and control assembly at my expense, refusing to cover it under the powertrain warranty. The manufacturer (general motors) is aware of this widespread defect and has issued technical service bulletins (TSB #mc-10199243-9999) about it, yet they fail to treat it as the serious safety issue it is. This component failure should be investigated for a formal safety recall before it leads to an accident, injury, or death.
We have a 2020 Blazer that will occasionally show "shift to park" error message and won't allow us to turn off the motor. Searching this issue, we see many people have the same problem and gm makes us pay to repair the problem. The dealer said the shift control module had to be replaced. It cost us almost $300. 00 to repair. Gm service bulletin no. : 19-na-206 has been issued but no recall has been issued by NHTSA. There are also several lawsuits filed but we have been unable to see the results of those lawsuits. Please make gm pay and/or reimburse for these repairs. We live in wiscons.
The valve on the thermostat stuck open causing the vehicle to go into a default mode. Ramping the radiator to full high and the thermostat will not come off of c. It has caused an issue with the a/c not blowing cold and also causes a message to pop up upon starting the vehicle stating that steering assistance is reduced, drive with caution. Upon doing research, thousands of people have had this similar issue with different model chevys as well. And the part is on the back side of the engine so injectors and air intakes have to be removed to preform any work to a $100 part.
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.
Rearview mirror camera failed causing rearview mirror monitor to fail creating a blind spot while trying to back up. When I went back to visually inspect the camera assembly nothing looked damaged and when I physically touched the camera it was extremely hot to the touch to the point of burning my finger tip.
Unknown car will not shift into park without me having to re-shift to park and then the vehicle will shut off after re-shifting.
Transmission skips while driving, there’s some sort of glitch with the electrical that causes the steering assist to shut down and the fan to over work, like it would if it were over heating but the temp of normal.
Value stem gasket covers need replacing oil spilling out everywhere it’s a 2020 should not be happening oil leak hot and cold temperature not working properly a warning flashing for the power steering being deceased and not use that car get moved every hour just about always in jt working or just taking a break the auto shut of makes transmission slip or sounds like it is.
My vehicle idiot lights were flashing and the car felt as if it was going to stall on the road. Dealer said it was a faulty p6. Now when driving the car the entertainment unit locked up. Radio could not be changed, volume lowered. Pedals on steering column don't work. Even when car was shut off the radio still played and would cut off. Called my dealership. The earliest my chevy dealer can look at it is next week.
Shift to park displays despite being in park. I cannot turn off the car or lock the doors.
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.
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!.
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.
Twice while I have been driving the instrument panel went blank. In motion.