Power Train Problems of Chevrolet Blazer - part 2

The contact owns a 2021 Chevrolet Blazer. The contact stated that while driving at an undisclosed speed, there was an abnormal roaring sound coming from the engine compartment. There was no warning light illuminated. The vehicle was taken to the dealer, who diagnosed a failure with the transmission. The contact was informed there were metal fragments inside the transmission fluid. The vehicle was not repaired. The contact was informed that the transmission needed to be replaced. The manufacturer was notified of the failure, and a case was opened. The failure mileage was 84,000.

See all problems of the 2021 Chevrolet Blazer 🔎.

Cooling ran would never shut off, 'steering assist reduced drive with care', the smell of sweet syrup (coolant), and the temp gauge would not leave 'c'. All of this happened at once. Brought it in as it was subsequently throwing codes. Chevy heiderbrecht dealership said that the radiator seal at 53k is completely eroded away and needs to be replaced. They said this is a very common issue with these cars (2020 Blazer/original owner), and looking online there is a plethora of people with the exact same issue (low mileage, complete radiator replacement due to seal going bad on upper driver side). This is insane, you spend 40k on a car, maintain it well, and the parts fail this prematurely with no available recall? now I am stuck with an $1,800 bill with no legal recourse? I mean the dealership said it is a widely known issue, and gm has admitted that the seal is bad, but there's no consumer protection from this big of a company? only thing covered under powertrain warranty is the thermostat (wow thanks gm!) thanks for any help you can provide.

See all problems of the 2020 Chevrolet Blazer 🔎.

Reduced steering warning, the temperature gague is stuck on c, radiator fan is running on high as soon as I start my car and the transmission is shifting hard at second and third gears.

See all problems of the 2019 Chevrolet Blazer 🔎.

On Saturday, March 8, 2025 I was crossing a busy intersection when my car shut off completely and accelerated into oncoming traffic almost causing a collision or fatality. My brakes locked and steering wheel locked. I had to put the emergency brake on in order for the car to come to a stop. We got out of the car in the middle of the street and ran for safety. Scariest experience I’ve ever been in especially with my family in the car!!.

Frequently when shutting off my Blazer, I will get an alert that the vehicle is not in park. I have to squeeze and jiggle the shifter in order to get the alert to go away. On several occasions, when I have turned the engine on and back off again without ever touch the gear shifter, I will get the same alert that the vehicle is not in park. If the issue is not just the sensor/switch, this could mean that the transmission could potentially fall out of park and the vehicle start to roll on its own with no one inside.

When I go to put my car in park, I get a notice warning chime to shift it into park. Which then results me into not being able to turn off my car. I am then forced to sit in the car and try to wiggle the shifter until it registers that the car itself is in park. . This first happened to me a few days ago with my toddler and infant child in the car. Compromising my safety as well as the safety of my children, since I was now forced to sit in a public parking lot with my kids in the car trying to not only turn off the car, but also trying to make sure my car was properly parked and not an endangerment to others. I recently called a dealership on feb26,2025 and found out I had the problem fixed once before in 2021. I’m now currently working on getting my car to the dealer to get this issue resolved ASAP. Which is an inconvenience to me, my schedule as well as the schedule of others, since I now need assistance getting to and from the dealer along with taking my children to school and or appointments.

At around 55,000 miles my Blazer began to show error codes for “steering assist reduced” and “esc”. After 60,000 it began to intermittently populate the check engine light paired with the "steering assist reduced" message. Then, the engine fan would turn on high, auto-start when breaking would disable, and the steering would become more stiff. Finally, I was able to get a scan on the code and found out that it was my thermostat. After taking it to my local chevy dealer I was quoted $1100 to repair. When I called my local mechanic I was told they could fix it for cheaper, but they were unable to find an oem thermostat in stock which usually means there's a widespread issue with that part. Upon further research, I've found a plethora of complaints online where others with chevy vehicles are experiencing the same issue. This causes: -greater fuel consumption -risk for the engine to overheat -stiffened steering which could cause accidents.

A few months ago had Blazer in for oil change. That same day check engine light came on. Was told thermostat needed to be replaced. Needed to order part. Check engine light went out then steering maybe reduced just a week ago eventually check engine light came on. Took to dealership and thermostat needed to be replaced also radiator developed a leak. Just over 60000 miles.

The contact owns a 2019 Chevrolet Blazer. The contact stated that upon attempting to shift to park, the vehicle failed to register that the gear shifter had been shifted to park. The contact stated that the message “shift to park” was displayed. There was no warning light illuminated. The contact was unable to turn off the vehicle during the failure. The vehicle was taken to a local dealer where it was diagnosed, and the contact was advised that the shifter cable was faulty and needed to be replaced. The vehicle was repaired; however, the failure persisted. The manufacturer was notified of the failure. The approximate failure mileage was 114,000.

When attempting to put my car in park, the car issues a warning stating the car is not in park, it doesn't recognize the gear shift being in park, therefore, I am unable to shut my car off or lock it up. It is a known manufacturing defect and gm refuses to cover the cost to add a bandaid to it as there is no permanent fix. This is a safety issue, and now my car is not reliable, nor safe. Gm refuses to issue a recall on this.

The contact owns a 2020 Chevrolet Blazer. The contact stated while attempting to shift to park, the engine remained running, and the message "shift to park" was displayed. A mechanic was called to diagnose the vehicle, and the contact was informed that the transmission control, shifter harness, inline shifter wiring harness jumper, park switch, and other related components were faulty and needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure. The approximate failure mileage was 77,340.

Shift to park message coming up on dash screen eventhough shifter was in park. Engine would not turn off. Had to shift several times for vehicle to recognize park . There was a recall on some 2019 chevy Blazers and a technical service bulletin issued, but my VIN number is not on the recall list. The current mileage is 37752. I bought the vehicle new. Dealership relaced shifter control at a cost to me of $553. 60. If there is a safety issue, should a recall cover all ?.

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 put my car into park and go to shut the car off if starts saying put car in park even tho it is already in park. It will not allow me to fully shut car off when it says that. I usually have to put it back into drive and back into park again for it to register.

The Blazer is having a recurring p0128 code. We have informed the dealership. This has been going on for 2 years or so. I reset the code with a code reader and it stays off for a few months usually. Tried to have the dealership look at it one of the last times it happened but they wouldn't just look at it. . . They wanted to set up an appointment. We needed the car so I reset the code again. Now it is time to get it fixed. I know it needs a thermostat and temperature sensor. The cost to install it will be close to $1000. This should not be at my cost. This is a know issue with the 3. 6l engine and it affects the emissions of the vehicle along with many other parts of the engine. I am reaching out to see what can be done.

When placing the vehicle into park there is often a issue with the sensor recognizing that the vehicle stating that it is not when attempting to power off the vehicle. When stopping there are times that the vehicle is difficult to stop and there is not fault code as to what may be occurring.

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.

P0128 code- assisted steering fault check engine light ac blowing cold temp gauge flat lined need to replace temp sensor and thermostat. Others with this issue have reported steering can completely lock up, which could cause serious accidents which could result in fatalities.

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 contact owns a 2020 Chevrolet Blazer. The contact stated that the transmission was slipping while driving in the lower gears. The contact stated that the message “reduced steering - drive with caution” was displayed. The vehicle was taken to the dealer but was not diagnosed or repaired. The contact stated that the failure persisted, and the vehicle became inoperable. The manufacturer was informed of the failure and opened a case. The failure mileage was approximately 50,000.

2019 Blazer with 73,399 miles is in park, but displays "shift to park". System does not recognize that the vehicle is in park. Vehicle will not turn off even after shifting transmission to drive and then to park again. "shift to park" message won't reset. Dealership said it's $1,642 to fix issue. Afraid to drive the vehicle because it won't shut off, can't be locked, and will run out of gas/battery if "shift to park" displayed message can't be reset/fixed.

2020 chevy Blazer - shift to park while gear is already in park: while putting the gear in park, the warning chime to shift it into park is initiated. It has happened 3 to 4 times in the past three days. I took the vehicle to the local chevy dealership. The service team/dept. Diagnosed that the transmission shifter unit assembly must be replaced. The 2019 chevy Blazer had these issues which prompted a TSB/recall however it wasn't extended to the 2020-year models and chevy dealership refused to include it as a warranted repair which just passed 44,000 miles. This is a safety issue, and it should be replaced without additional cost to customer as this issue was already identified as a safety concern in 2019, however chevy does not want to identify the issue as a covered repair per the manufactures warranty.

2020 chevy Blazer- bad transmission at 130,000 miles.

The contact owns a 2020 Chevrolet Blazer. The contact stated that upon arriving to his destination, the vehicle failed to detect that the gear shifter was in park(p), preventing the vehicle from being turned off. The contact stated that the message "please shift to park" was displayed. There were no warning lights illuminated. The vehicle was not taken to the dealer or an independent mechanic. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was 50,000.

When I am shifting my vehicle to park (gear shift in console area) and turn my vehicle off I will get an error code in my dashboard that I need to shift to park. My gear shift in the console is lite up p and my dashboard electronic system says p; but when I try to turn my car off it won't turn off and stays on again giving me the error code that need to shift to park. I then have to turn my car back on to then try and turn it off with the same error code coming on. I can try pushing the gear shift further with no success, shift to different gears back to park, and try waiting a few minutes after shifting to park before turning it off and still no success. This is a safety issue that my car is not really in park and will take off if I take my foot off the brake when this is all occurring. I at one point had to turn my vehicle on and back off with no success at least 5 times before I can finally get it to turn off. This problem has been confirmed by multiple Chevrolet dealerships with all of them saying they have seen many vehicles (same make and model with other models included) with this issue. Manufacturer knows about it.

My shift to park comes on although the vehicle is parked my steering is reduced came on today this is a problem in mutiple forms in regards to chevy Blazers.

The contact owns a 2020 Chevrolet Blazer. The contact stated while the vehicle was parked in the driveway, the vehicle hesitated. The contact stated that while attempting to turn off the vehicle, the vehicle independently shifted out of gear. The vehicle was driven to the local dealer to be diagnosed. The dealer determined that the failure was a power train failure. The vehicle was not repaired. The manufacturer was notified on the failure. The approximate failure mileage was 49,000.

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.

The contact owns a 2019 Chevrolet Blazer. The contact stated while placing the vehicle in the park and attempting to turn off the vehicle, the message "shift to park" was displayed on the instrument panel, enabling the ability to turn off the vehicle. The transmission failed to lock the vehicle in park for the vehicle to be able to turn off. The vehicle was taken to the dealer where it was diagnosed that the harness part number: 84733196 and the switch part number: 84955379. The vehicle was repaired. The manufacturer was made aware of the failure and confirmed that there was no recall for the failure. The manufacturer referred the contact to the NHTSA hotline to report the failure. The failure mileage was 19,563.

8 out of 10 times I put the vehicle in park I receive a "shift to park" alert. I have to put it in another gear several times before it recognizes it is parked. Sometimes flicking the shifter push-in piece on the bottom will work. I am unsure if the car is officially parked when I don't get this message.

When the vehicle is shifted into park the indicator on the dashboard and the on the console next to the shifter display 'p' but when ignition is turned off a warning on the dash shows shift into park. It is on the web with multiple complaints. This problem appears on other gm platforms.

2019 chevy Blazer rs - 39,217 miles and shifter assembly is malfunctioning and will not allow car to turn off properly and leaving lights, beeping and miscellaneous dash indicators on. This is a known issue with chevy.

There is a current recall in place #19-na-206 that I believe should include my vehicles VIN number. There is an intermittent shift to park message that appears when the vehicle had been shifted into park and the ignition has been turned to off position. Making it unsafe as I am not sure if the vehicle is actually in park or not.

I cannot shut off my vehicle. When I turn off engine warning message and alert binging tells me to shift to park. The vehicle is in park but vehicle does not register that it’s in park. I’m stuck in vehicle which will not stop alerts and runs down battery. This is a hazardous situation. I can’t tell if car is actually engaged in park or not. This started happening intermittently over the last month but now it happens 8 times out of 10 when I try to shut off the vehicle.