2019 Chevrolet Blazer engine problems

Filed Nov 2, 2026 · Engine, Steering · VA

Steering assist reduced message appeared Check engine light appeared, po128 code, thermostat and sensor defect. Common problem with these vehicles, GM has only recalled 2021 model even though the same engine and thermostat are on all V-6 models. Contacted GM, no assistance available on my year Blazer.

Filed Aug 27, 2026 · Driver assistance, Engine · OH

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

Filed Aug 27, 2026 · Body, Engine · 22,000 miles · PA

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.

Filed Aug 18, 2026 · Engine, Transmission · NY

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

Filed May 25, 2026 · Electrical, Engine · MD

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.

Filed Apr 13, 2026 · Engine · MO

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.

Filed Feb 24, 2026 · Engine · IL

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.

Filed Feb 9, 2026 · Engine, Steering · FL

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

Filed Feb 2, 2026 · Engine · KY

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

Filed Jan 17, 2026 · Engine, Steering · WV

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.