2019 Chevrolet Blazer

186 complaints on file, page 1 of 10.

1. Filed Aug 27, 2026Failure Jun 9, 2026Middletown, OHRearview system braking, Engine, Blind spot detection

   Just had to replace a radiator that was leaking all across the top. Also have gotten the steering assist warning for thermostat and temperature sensor. Seems to be cery common problems rhat gm ahould fix

   NHTSA complaint 11760166
2. Filed Aug 27, 2026Failure Aug 27, 202622,000 milesNorthampton, PARadiator assembly, Power train, Structure

   The contact owns a 2019 Chevrolet Blazer. The contact stated that while starting the vehicle, there was a strong odor coming from the vehicle, and no warning lights illuminated. The contact also stated that a "Shift to Park" warning message displayed while the vehicle was already in Park, requiring multiple shifting attempts to clear the message. The vehicle was taken to a dealer, where it was diagnosed that the radiator had failed and needed replacement. The vehicle was repaired. The contact was informed that the radiator issue was a known failure that could recur. Additionally, an inspection revealed that the rear tow hook had failed and needed replacement. The vehicle was repaired. Regarding the shifter failure, the contact was informed that the failure could not be duplicated. The manufacturer was not notified of the failure. The failure mileage was approximately 22,000.

   NHTSA complaint 11760052
3. Filed Aug 18, 2026Failure Aug 13, 2026Utica, NYEngine, Power train

   Thermostat went bad at 47,500 miles. Temp gauge stopped working, Engine light came on and alert stating steering assist is reduced

   NHTSA complaint 11757806
4. Filed Jul 30, 2026Failure May 21, 2026Lino Lakes, MNElectrical system

   Shift to park sensor Shift to park warning. It was reported to dealer

   NHTSA complaint 11753831
5. Filed Jun 16, 2026Failure May 13, 2026Chicago, ILUnknown or other

   1º Transmisión 2º Me quede detenida en una autopista y no podía avanzar por que no respondía a los cambios de velocidad 3º Si 4º Si 5º No

   NHTSA complaint 11744461
6. Filed May 27, 2026Failure May 26, 2026Pinckney, MIUnknown or other

   I was driving into a parking lot when my back passenger side window imploded like a rock was thrown at it, but no rock and nobody in sight. I looked all around for a cause but believe it somehow spontaneous shattered. Thankfully 3 minutes prior I had dropped my kids at school otherwise there would have been injury I am sure.

   NHTSA complaint 11740494
7. Filed May 25, 2026Failure Mar 3, 2026Aberdeen, MDElectrical system, Engine, Steering

   Electronically controlled thermostat and sensor fail or get stuck at a much lower coolant temperature causing the dash to display the “steering assist is reduced drive with care.” It isn’t just a message, the steering is much harder to use potentially causing an accident. The ac completely doesn’t work causing potential for sensitive, elderly, or young children and pets to overheat inside, it’s significant risk of injury or death from the hot summer temperatures. The engine coolant temperature gauge is all the way down on C position which isn’t registering how hot/cold the engine gets potentially causing damage to the vehicle and a total loss of the vehicle entirely due to damage from the engine overheating. GM sent out letters to 2021 blazer owners which included a special coverage number N252508350 applying to people with this year having this problem and they have until 2036 or 150,009 mi to get the repairs made free of charge, they just bring the document with the special repair codes to the dealer and they fix it free of charge. After doing research online, this problem is affecting all years of the 2019+ blazers with the 3.6L V6 engine AND other known problems with other models and years of their other lineup of cars, it’s very widespread across their platforms. So what are people supposed to do when it isn’t the 2021 year? Pay an $800+ repair bill to GM when they KNOW it’s more widespread than just this year/make? This is a scam. I can’t even do the repair myself because I’m having trouble finding the correct parts online and not only that the repair is extensive, the whole top half of the engine needs to be taken apart just to get to the thermostat, we’re talking the airbox and intake manifold, all the plastic parts and shrouds and sensors covering engine, the fuel rail and injectors, pipes and clamps, engine coolant needs drained and refilled. It’s a major fix. I’m reporting this complaint to raise awareness and hopefully GM will do the right thing.

   NHTSA complaint 11739939
8. Filed Apr 30, 2026Failure Apr 12, 2026Splendora, TXSteering

   Power steering goes out intermittently while driving.

   NHTSA complaint 11734804
9. Filed Apr 29, 2026Failure Apr 25, 2026Virginia Beach, VAVehicle speed control

   The transmission or torque converter has slippage and shuddering that has caused one or both to go bad. My safety was at risk due to this item beginning to fail to cause the inability to accelerate to maintain my position in traffic. The problem was recreated for the service technician. There was no warning or indication before this became an issue.

   NHTSA complaint 11734708
10. Filed Apr 23, 2026Failure Mar 17, 2026Detroit, MIAutomatic emergency braking, Warnings, Unknown or other

    My vehicle is breaking on its own. There are other vehicles riding behind me and it just stops out of nowhere. I think that's dangerous. I can be driving and I'm thinking I'm OK driving in a vehicle. Just just hit on break. I don't know where I just stops and while I'm driving and I think that's very dangerous

    NHTSA complaint 11733343
11. Filed Apr 13, 2026Failure Mar 30, 2026Lake Winnebago, MOEngine, Unknown or other

    The vehicle will not shut off when you shift to park. You are forced to sit in the vehicle for extended periods of time attempting to get the vehicle turned off. Apparently Chevy is familiar with eat problem and there are pending class action law suits in Ohio. According to the dealership Chevy has acknowledged there is a defect but no recall has been issued. We have had this issue for about two months and it is getting worse.

    NHTSA complaint 11730819
12. Filed Apr 6, 2026Failure Feb 9, 2026Iuka, MSElectrical system, Power train, Steering

    Shift to Park issue: Known issue where the car fails to recognize it is in Park, preventing it from shutting off. Electronics: Potential blanked-out display screens, USB port issues, and malfunctioning cameras. Steering Assist: Restricted, temperature gauge goes to cold and radiator fan blows hard. I have to unplug negative cable to battery and reconnect and everything goes back to normal.

    NHTSA complaint 11729329
13. Filed Mar 23, 2026Failure Mar 20, 2026Elk River, MNElectrical system, Unknown or other

    2019 Chevy Blazer. Car would not turn off the electrical components when parked. Put car in park and walked away and there is a warning note that says, "Shift to Park." But the car was in park. Called Chevy and they know about the issue on the 2019-2023 vehicles. They sent me the Technical Service Bulletin. Back in 2020, the car had the shifting harness and button replaced and we just had to have it replaced again because it is a consistent issue with the vehicle. Except this time, the dealer charged us $668.40 to fix it! It is a known issue by the company and THEY sent me the service bulletin to get it fixed. It should have been covered by Chevy, or, at least a recall should be instituted. The power to the car wouldn't shut off. We were able to jump the car to get it started again.

    NHTSA complaint 11726346
14. Filed Mar 16, 2026Failure Jan 22, 2026Fayetteville, NCUnknown or other

    I believe my thermostat is a problem. I keep getting "P012B" "coolant under operating temperature" codes on my obd2 meter. This seems to coincide with "driver assist reduced" on my instrument cluster on my dash board. I researched it and on a forum it sounds to be a very common problem. Someone said to report it on here. I can clear the "p012b" error code with my obd2 and my thermostat instantly becomes responsive however it comes back within 2 days or so.

    NHTSA complaint 11724737
15. Filed Feb 24, 2026Failure Feb 24, 2026New Lenox, ILEngine

    Faulty thermostat. Check engine light comes on due to thermostat getting stuck open and needing to be replaced. This is terrible for the engine and the environment.

    NHTSA complaint 11720293
16. Filed Feb 18, 2026Failure Feb 17, 2026Nashville, TNPower train

    P0128 code. Coolant temperature sensor and thermostat failure.

    NHTSA complaint 11718805
17. Filed Feb 9, 2026Failure Nov 20, 2025Kingwood, TXElectrical system, Power train, Steering

    The shift-to-park sensor in my 2019 Chevy Blazer RS is malfunctioning. After shifting into park, the vehicle does not detect that it is in park and displays a “Shift to Park” message. The issue is/has been ongoing and now it is almost impossible to bypass with wiggling the shifter. 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 was taken in to the dealership in November/December 2025 due to MULTIPLE Warning Lights: “Shift to Park”, "Steering Assist", "Stabilink" and the usb-C charging port under the radio screen will stop working all together when this happens as well. This started around September 2025 and has occurred regularly since.

    NHTSA complaint 11716876
18. Filed Feb 9, 2026Failure Feb 9, 2026Riverview, FLEngine, Steering, Unknown or other

    Thermostat Housing Replacement + Dexcool: P0128, thermostat stuck. Was told this can cause engine to overheat.

    NHTSA complaint 11716857
19. Filed Feb 2, 2026Failure Sep 1, 2025Paducah, KYEngine

    The thermostat has been sticking, and needs to be replaced after only 30,000 miles.

    NHTSA complaint 11715177
20. Filed Jan 17, 2026Failure Aug 1, 2025Weirton, WVEngine, Steering

    Was getting a steering assist reduced error code. Auto stop quit functioning and air conditioning stopped cooling. Engine sounded like a jet. P 0128 thermostat error code came up and had to be replaced. I see lots of similar complaints. Cost me $700.

    NHTSA complaint 11711579