The car is not sensing that it is in park when it is. When I place it in park and turn the car off it dings and says shift into park however it already is in park. Therefore the car will not turn off. I had to jiggle the shift or turn the car on, reverse then go forward then park to get it to register. This has taken up to 10 minutes and it’s getting worse. This is a known issue that is referenced in GM Technical Service Bulletin 19-NA-206.
NHTSA complaint #11758760 — an unverified report by a vehicle owner.
Onaway, MI
UNKNOWN OR OTHER
Engine temp gauge stops working causing the air to stop working and the cooling fan to rev to highest rpm. Also a warning that the steering assist is reduced. Eng check light comes on with a code P0208. This a known problem with an extended service # (N242484760) but only if your vin is listed. All vehicles with this problem should be covered. This seem to be a common problem, as my co-worker is having the same issue. This should be a recall as the steering is affected.
NHTSA complaint #11743407 — an unverified report by a vehicle owner.
Harrison Twp, MI
UNKNOWN OR OTHER
This is what came up on my screen.Steering wheel assist reduced.Drive with care. My hot and cold gauge drop to C and stayed there for about 4 days and my a/c was blowing out hot air. I was told a lot of these Suvs have done this.
NHTSA complaint #11741925 — an unverified report by a vehicle owner.
Athens, GA
UNKNOWN OR OTHER
The radiator in these cars constantly fails. This can lead to major engine issues. Multiple Chevy owners have reported defects
NHTSA complaint #11740743 — an unverified report by a vehicle owner.
Grove, OK
UNKNOWN OR OTHER
Variable Valve Timing (VVT) exhaust Solenoid engine light has been coming on and turning off immediately for a few months, finally found the issue. $665 replacement.
NHTSA complaint #11740105 — an unverified report by a vehicle owner.
Canastota, NY
UNKNOWN OR OTHER
The temperature gauge does not work, it stays at cold. The heater does not work unless the car is moving. AC does not blow cold air at all. I get a message that says “steering assist is reduced. Drive with care”. There are a lot of people online with the same complaints on these vehicles
NHTSA complaint #11740247 — an unverified report by a vehicle owner.
Aurora, IL
UNKNOWN OR OTHER
Vehicle: 2020 Chevrolet Blazer Issue: “Shift to Park” malfunction Description: The vehicle repeatedly displays a “Shift to Park” warning message even when the gear selector is fully placed in Park. Because of this issue, the vehicle does not always shut off properly and may continue running electrical systems after the engine is turned off. Symptoms include: * Warning message stating “Shift to Park” * Vehicle not recognizing that it is in Park * Difficulty shutting vehicle off completely * Doors/horn behavior acting abnormally after exiting vehicle * Concern about battery drain and vehicle safety The issue occurs intermittently but has become more frequent over time. The shifter often must be moved multiple times before the warning clears. This appears to be a widespread issue affecting many GM vehicles and may involve a defective shifter assembly or park switch component. I am concerned this defect could: * cause unexpected battery failure, * prevent the vehicle from shutting down properly, * create a safety risk if the vehicle does not correctly recognize Park status
NHTSA complaint #11738429 — an unverified report by a vehicle owner.
Dearborn Heights, MI
UNKNOWN OR OTHER
Driving down the road at 50 mpg when to car just shut off had a hard time getting it off the road and did still was all the way we almost got hit three times
NHTSA complaint #11717071 — an unverified report by a vehicle owner.
Prairieville, LA
UNKNOWN OR OTHER
Action required steering assist reduced and coolant temperature at 0. Air con blowing hot and check engine light on. The vehicle became hard to handle and keep in my lane on the interstate at high speeds. The problem has persisted. It has not been recitfied. I am not driving the car to avoid damage and danger. I bought the blazer on 1/6/26. The lights and issues began 8 days later. Dealership will not help me. 2020 Blazer RS AWD bought from Morgan city Toyota Louisiana
NHTSA complaint #11711479 — an unverified report by a vehicle owner.
NHTSA complaint #11710963 — an unverified report by a vehicle owner.
Swanton, OH
UNKNOWN OR OTHER
1) Part that failed per General Motors Chevrolet dealer was the Thermostat along with Coolant Sensor. 2) I was getting warning notices on dash board screen stating (Reduced steering assist) I was also getting a ESC warning 3) Problem has been repaired at GM dealer 4) Parts were replaced by GM dealer/service center 5) ESC warning light that came on for a short time after motor stopped for auto stop / start and then restarted. If auto stop / start was turned off ESC warning did not come on. Reduced steering assist warning would come on but then go off. Finally the service engine light came on and stayed on. 6) GM Service stated Code for engine light was P01F0. Autozone read a P0128 code. 7) From investigating online this seems to be a very common problem with the 2019 and 2020 Chevrolet Blazer with the 6 cylinder engine. Note: I believe this should be a warranty repair due to the fact that 1) This is a known issue with the 2020 Blazer and known poor design 2) The warning about reduced steering assist and 3) ESC warning
NHTSA complaint #11709700 — an unverified report by a vehicle owner.
Ooltewah, TN
UNKNOWN OR OTHER
Back up camera quit workingsometime ago.I took it to dealership.Fix did not last long.Out again.
NHTSA complaint #11697619 — an unverified report by a vehicle owner.
Chicago, IL
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.
NHTSA complaint #11695572 — an unverified report by a vehicle owner.
Arcanum, OH
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
NHTSA complaint #11693643 — an unverified report by a vehicle owner.
Highland, IN
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.
NHTSA complaint #11691458 — an unverified report by a vehicle owner.
Adrian, MI
UNKNOWN OR OTHER
Vehicle thermostat would read cold while operating and the AC was not working. A message would populate in the dash stating "steering assist is reduced drive with care." Multiple forums stated it was a thermostat issue or temperature sensor. Also attempted to disconnect the battery for several minutes which would in turn clear the message and all would be working fine. This has been done multiple times and is at random when the message and AC stop working
NHTSA complaint #11691268 — an unverified report by a vehicle owner.
Olive Branch, MS
UNKNOWN OR OTHER
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.
NHTSA complaint #11690677 — an unverified report by a vehicle owner.
Omaha, NE
UNKNOWN OR OTHER
While driving an alert came up "adaptive steering limited, drive with care". At the same time, my AC stopped working a d my thermostat dropped to cold and will not move from there. From searching online, this is a common and known issue with Chevy SUVs yet there is no recall or attempt to correct.
NHTSA complaint #11688073 — an unverified report by a vehicle owner.
Monroe, GA
UNKNOWN OR OTHER
When you shift to park it tells you shift to park and you can't turn the car off.
NHTSA complaint #11683731 — an unverified report by a vehicle owner.
Marshall, MI
UNKNOWN OR OTHER
Shifter Assembly and Harness When putting vehicle into "Park" and then shutting off the vehicle a warning message would appear that the car had to be placed into park and a beeper would sound. Never sure if vehicle is actually in park. Have to restart the vehicle, move the parking gear from park, then back into park until message does not appear. This issue was a recall for the 2013-2019 Chevy Blazers, but was not recalled for the 2020 Blazer, although it appears that this is still an issue. Had issue repaired by paying for the replacement of this shifter assembly.
NHTSA complaint #11681708 — an unverified report by a vehicle owner.
Muscle Shoals, AL
UNKNOWN OR OTHER
I am experiencing the well known "shift to park message" while the shifter is in park. I cannot turn the vehicle off and I am worried the battery will die. This is a well documented issue with this vehicle, and several other models outlined in TSB 19-NA-206, for years and yet they refuse to issue a recall to repair the faulty design or component . I have reached out to them via email, but no action has been taken, see email below. ------------------------------------------------------------------------------------- GM Customer Care, I am writing to request assistance regarding an issue with my 2020 Chevy Blazer VIN# [XXX] . This is my fourth new GM vehicle, and while it is currently outside the 36-month warranty period, the vehicle has only 18,800 miles on it. Recently, the vehicle began displaying a persistent "Shift to Park" message on the Driver Information Center, despite the gearshift being in the Park position. As a result, the vehicle remains in the ON position and cannot be turned off. This is a well-documented issue affecting several GM models, including the Blazer, Acadia, Malibu, Traverse, and Volt. For reference, please see TSB 19-NA-206 attached. Repair costs for this issue appear to vary widely, sometimes exceeding $1,000 depending on location and dealership. Given that this appears to be a known design or component issue, I do not believe this should be an out-of-pocket expense for the customer. As a long-time GM customer, I respectfully request that GM cover the cost of this repair. I am disappointed that there has been no proactive recall or service campaign, especially considering the volume of customer complaints reported online. Thank you for your time and attention. I look forward to your response and hope GM will stand behind its products in this matter. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
NHTSA complaint #11672407 — an unverified report by a vehicle owner.
Piedmont, SC
UNKNOWN OR OTHER
Shift to park message began appearing even after the shifter knob was in park. I cannot turn the vehicle off and it rolled backwards due to the vehicle not recognizing it was in park. This has now cost $700 to repair when its been a known issue with these vehicles for over 6 years and yet they refuse to issue a recall. This is dangerous and disgusting practice for a vehicle manufacturer to avoid keeping their customers safe.
NHTSA complaint #11669125 — an unverified report by a vehicle owner.
Molalla, OR
UNKNOWN OR OTHER
When I come to a stop, in an attempt to park, I will shift into park but a message will appear on my dash saying to shift to park this prevents me from shutting off the vehicle. The issue is persistent at times, but happens intermittently.
NHTSA complaint #11669137 — an unverified report by a vehicle owner.
Wyoming, MI
UNKNOWN OR OTHER
In March 2025 a Steering assist reduced warning came on briefly. Over the next several weeks intermittent. April 2025 Engine warning light came on. 4-14-25 Went to ToddWenzel Chevrolet for diagnosis to be told the Thermostat needs to be changed and due to a small amount of crystallization on the radiator that as well. I had just had oil changed and fluid levels topped off that morning at Parkway express who did not identify concerns. 4-15-25 brought to Parker Brake who diagnosed and identified there was a glitch that prompted the warning and they can tell that fired when not driving, temp 125Degrees. "it may have been parked cooling down". They noted not need for additional service. Thermostat fine and no evidence of radiator leak. They cleared codes/engine warning. After about a week experiencing intermittent assist reduced warning again. I am understanding that this is a known problem w/ these Blazers and changing thermostat for many does not work. Where does this leave me? GM needs to help with the cost and figuring this out. I am concerned about sudden failure of something while driving that could be unsafe for myself/others.
NHTSA complaint #11657766 — an unverified report by a vehicle owner.
Oshkosh, WI
UNKNOWN OR OTHER
Blazer was brand new purchase, I have experienced the following issues so far (several issues appear to be common based on internet searches): 1. Oil pan replaced 4 years 2. Thermostat replaced around same time, this impacted steering 3. Today I replaced a transmission seal for $600, looks like a recall was issued on bolts, my vin was not in population 4. At todays appointment was told the radiator is leaking and I will need a new radiator.
NHTSA complaint #11656880 — an unverified report by a vehicle owner.
Katy, TX
UNKNOWN OR OTHER
At 41,024 the AC comoressor locked up. Took it to a repair shop. Then a year later the "steering assist light" came on. Took it to repair shop. Couldnt duplicate because it would start woring again. Had heat sensor replaced. That worked for a bit. Then it did it again. Replaced thermostate. That worked for a little bit. Then the Overheated light came on. Told me to shut the car down. (I had only drove 1/2 mile. Get out....nothing! No leaks coolant good. Had it towed to a shop And just had the thermostat changed again! Im not going to find out what happens next. I got ine more patment in tgis thing and Im trading it in. Its not a trustworthing vehicle for a single lady. Never buying a chevy again. I cannot wait to get it off my hands! 2 years everything started having issues.
NHTSA complaint #11655309 — an unverified report by a vehicle owner.
Marrero, LA
UNKNOWN OR OTHER
COMMON ISSUE, The steering assist is reduced and temp gauge is stuck on C. This either a thermostat or temp sensor issue.
NHTSA complaint #11651005 — an unverified report by a vehicle owner.
Frankfort, KY
UNKNOWN OR OTHER
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!!
NHTSA complaint #11647514 — an unverified report by a vehicle owner.
Repton, AL
UNKNOWN OR OTHER
“Shift to Park”message appears when I shift to park and turn car off.
NHTSA complaint #11643912 — an unverified report by a vehicle owner.
Circleville, OH
UNKNOWN OR OTHER
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.
NHTSA complaint #11625728 — an unverified report by a vehicle owner.