To whom it may concern, I purchased a new 2020 Chevy Blazer from the dealership five years ago. Since then I have had to replace my battery twice, radiator and now the thermostat all of which have been done at the dealership. The car and all receipts of the repairs are available for inspection if requested. This most recent mechanical issue with the thermostat included the following; fans blowing on high, no AC, check engine light, steering assist reduced message, and temp gauge on C. The car was immediately (same day) taken to the dealership for investigation. Upon inspecting the car the mechanic found the thermostat sticking open and indicated that it would need to be replaced as it was unsafe to drive. A total cost of $1400. It seemed odd that my car is only 5 years old with 75k miles and needing to have the thermostat replaced so I started researching this issue further. I found several complaints on the www.chevyblazer.org forum from other 2020 Chevy Blazer owners with the same mechanical issue. There is one comment on the forum from a mechanic stating that this issue is caused by a faulty wire harness and will continue to cause similar issues until the wiring is fixed. You can find those comments in the forum on www.chevyblazer.org This continues to be an ongoing issue with this make and model of Blazer with no consistent fix from the dealer. I believe my previous battery and radiator issues are all related. I am reaching out to you for assistance and/or guidance to help get this mechanical issue reported as a recall by the dealer and properly fixed at dealer cost. I am happy to provide any additional support you may need to research this further. Thank you in advance.

- Ivins, UT, USA

Engine fan stuck on high, air conditioner does not work, temperature gauge stuck on cold, driving assist warning light on.

- Exira, IA, USA

I have had to replace the radiator 3 times since I've owned this vehicle. I see where there are others with the same issue. Now I have to replace the thermostat my first radiator was replaced at 16k miles. This is a safety issue because my car over heated and broke down on the highway left me stranded

- Saint Louis, MO, USA

Chronic code P0128, causes cooling fans to go on high, AC doesn't work and steering assist reduced. GM calls for the thermostat to be replaced, at the cost of $1400 at my local Chevrolet dealer. Worked fine for two months then code and issues come back. Online forums are full of people with the same problem. Clearly there is an issue with these vehicles with the 3.6l motor.

- Blackwell, OK, USA

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.

- Dayton, TX, USA

Radiator was found to be leaking. Now thermostat is sticking. This could have caused my engine to overheat and catch fire. I have had a mechanical shop replace the radiator but could not afford to replace the thermostat yet. I had been seeing warning lights and still see warnings after radiator was replaced. They said -??Steering Assist Reduced-?? and -??ESC-?? and the engine light came on. I went to Auto Zone Dec 9th to have them tell me what was wrong. I took to shop on Dec 13th. I have googled several complaints about Chevy blazers having this particular problems. This is apparently a widespread issue that needs to be recalled.

- Bells, TN, USA

Steering assist warning and engine check light are on. I had an scan done and was told it was the thermostat and coolant temperature sensor which seems to be a common problem. There are no safety concerns to my knowledge. I feel this problem needs to be addressed as repairs are very costly.

- Archbold , OH, USA

The 2020 blazer is having the same coolant temperature problem the 2021 blazer has and the recall needs to be expanded. Thermostat messed up, constantly losing coolant, check engine light, steering reduced

- Madison, AL, USA

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!

- Dawsonville, GA, USA

2020 Chevy blazer with 50,000 miles just had to have the thermostat housing replaced. Check engine light would everntually come on. But it would say "Steering assist reduced drive with care" When hooked up to the computer it read code P0128. I have the extended warranty and still had to pay over $600 to have this fixed which is completey ridiculous for how new and expensice this car is.

- Edgewater , MD, USA

Shift to park issues. Car not reading that it-??s in park.

- Clarksville , TN, USA

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.

- Hager City, WI, USA

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

- Waterbury, CT, USA

Approximately three weeks ago, our 2020 Chevrolet Blazer's check engine light came on. It has a little over 63,000 miles on it. I took it to a private service garage where they diagnosed the code as P0128, or coolant system issue. They concluded that it was the thermostat. I did some checking on the warranty and it turns out that the warranty on this car expired at 61,066 miles. I then took it to Serra Chevrolet in Grand Blanc, MI where they diagnosed the same error code, or P0128. They took the car back to give me a service estimate and when they returned they diagnosed not only the thermostat as defective. This has become a common problem with this car and the 3.6 liter engine in particular. We have been told that this is a "known issue" by two different General Motors dealerships, specifically in their respective service departments. However, the owners are now having to pay for the complete replacement, both parts and labor, for these issues. Given the fact that these are a known issue, it seems to me that these need to be elevated to at least a bulletin, if not a full recall. The repair and replacement for the thermostat and sensor is in excess of $1,000. Again, since this is a known issue, it is my belief that General Motors should pay these expenses.

- Flushing, MI, USA

This vehicle is currently on its third radiator since it was purchased, 4 years ago. That-??s almost 1 radiator per year. The vehicle also has transmission issues on the highway. The dealer replaced the torque converter but vehicle is still hesitant and bucking on the highway. This vehicle only has 64,000 KM and would cost thousands in repairs if it wasn-??t under warranty.

- Cbs , AL, USA

The "steering assist reduced; drive with care" notification began coming on the dash with significant changes in outdoor temperature, as of last fall 2023. The temperature gauge on the dash would then not work and would remain at cold. Eventually the check engine light will come on however all of this will clear when the outdoor weather is stable again. As I live in MN you can imagine there are many variations to our temperatures. This occurred at the beginning of fall 2023, then winter 2023, then spring 2024. It is clear from consult with mechanics that this is all related to the thermostat being stuck open/closed. This is a very well documented issue for Blazers and I would even refer you to [XXX] which has pages and pages of both concerns related to this issue as well as radiator cracks; which I am dealing with also. This car has less than 60,000 on it! The radiators are also obviously faulty in these Blazers as well given the amount of people needing to replace these before 60,000. Some even reporting replacement under 30,000 miles which is ridiculous for a $52,000 vehicle. I would also direct you to a Facebook group of Blazer owners and the complaints about these two issues are rampant. (2019+ Chevy Blazer Official Group) [XXX] I had an appointment at Rosedale Chevrolet in MN on [XXX] and after diagnostics, and all of the above was confirmed. This issue poses a safety risk given the potential impact to the steering assist, air conditioning in hot temperatures, the car overheating and engine damage which WOULD be covered under the powertrain warranty, as well as the potential of being stranded due to a break down. This issue appears to be primed for a class action lawsuit. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

- Saint Paul , MN, USA

Steering assist reduced warning came on as I was driving. Electric steering module has gone bad.Temp gage and AC stopped working as well. No accident yet but this is a KNOWN SAFETY DEFECT that needs to have a recall. The steering wheel could lock up. Force GM to recall this vechile before people die!!

- Mesa, AZ, USA

Transmission issue, computer repair, constant issues.

- Eastpointe, MI, USA

My vehicle needs a new purge pump which is part of the emissions system. This is a common problem on this vehicle so it should be covered by GM since it is part of the emissions system.

- Shorewood, IL, USA

The car repeatedly has an error pop up that states steering assist is no longer activated and to drive with caution. The thermostat during this is also fully on cold. The check engine comes on after. The sensor and thermostat are repaired based on the code and problem persists. Same problem all over forums but Chevy refuses to fix as no recall. This is very concerning as the car may randomly go into limp mode while driving on the highway at 70mph putting at risk for crashing. The steering assist is also out putting at further risk. This is despite fixing and clearing the codes shown. This is a known issue that Chevy is refusing to address/recall.

- Choctaw , OK, USA