2020 Chevrolet Blazer problems, complaints & recalls

2020 Chevrolet Blazer recalls (3)

• Recall 21V115000Feb 25, 202133,838 vehicles
  TIRES

  General Motors LLC (GM) is recalling certain 2020 Buick Enclave, Cadillac XT4, XT5, Escalade, Escalade ESV, Chevrolet Suburban, Tahoe, Traverse, GMC Yukon, Yukon XL, 2018-2021 Chevrolet Express, GMC Savana, 2019-2020 Chevrolet Blazer, Silverado 1500, GMC Acadia, Sierra 1500, and certain Continental tires sold to the aftermarket for various model year 2018-2021 vehicles. The affected tires were cured for too long during production.

  Risk: Over cured tires may develop a break in the sidewall resulting in sudden air loss or a belt edge separation which could lead to a tread/belt loss. Either condition can cause a loss of vehicle control, increasing the risk of a crash.

  Remedy: GM will notify owners, and dealers will inspect the tires, replacing them as necessary, free of charge. The recall began March 22, 2021. Owners may contact GMC customer service at 1-888-988-7267, Buick customer service at 1-866-608-8080, Chevrolet customer service at 1-800-222-1020 or Cadillac customer service at 1-800-458-8006. GM's number for this recall is N212329050.

• Recall 20V668000Oct 29, 2020194,105 vehicles
  POWER TRAIN:AUTOMATIC TRANSMISSION

  General Motors LLC (GM) is recalling certain 2018-2019 Chevrolet Cruze and Buick LaCrosse, 2018-2020 Chevrolet Equinox, Chevrolet Traverse and GMC Terrain, 2018 Chevrolet Malibu, 2019-2020 Buick Encore, Buick Enclave, Cadillac XT4, Chevrolet Blazer and GMC Acadia, and 2020 Cadillac XT6 vehicles. The start/stop accumulator endcap may have missing bolts.

  Risk: Missing bolts on the start-stop accumulator endcap could result in a transmission oil leak and may progress to a loss of propulsion, increasing the risk of a crash. A transmission fluid leak in the presence of an ignition source may increase the risk of fire.

  Remedy: GM will notify owners, and dealers will inspect the start-stop transmission accumulator and replace it if any bolts are missing, free of charge. The recall began December 15, 2020. Owners may contact GMC customer service at 1-888-988-7267, Buick Customer service at 1-866-608-8080, Chevrolet customer service at 1-800-222-1020 or Cadillac customer service at 1-800-458-8006. GM's number for this recall is N202313440.

• Recall 20V446000Jul 30, 2020769 vehicles
  AIR BAGS:SIDE/WINDOW:CURTAIN:INFLATOR

  General Motors, LLC. (GM) is recalling certain 2020 Buick Enclave, Cadillac XT5 and XT6, Chevrolet Blazer, Silverado 1500, 2500 and 3500 and Traverse and GMC Acadia and Sierra 1500, 2500 and 3500 vehicles. The diffuser component of the Roof-Rail Air Bag (RRAB) inflator may not have been properly crimped to the inflator and could separate from the inflator during air bag deployment.

  Risk: If the diffuser separates from the inflator during deployment, RRAB performance may be degraded, increasing the risk of injury in a crash.

  Remedy: GM will notify owners, and dealers will replace the suspect RRAB modules, free of charge. The recall began September 3, 2020. Owners may contact Chevrolet customer service at 1-800-630-2438, Cadillac customer service at 1-800-333-4223, or Buick customer service at 1-800-521-7300. GM's number for this recall is N202305380.

NHTSA 5-Star safety ratings

Recent 2020 Chevrolet Blazer complaints

Excerpts of the newest owner complaints, lightly cleaned of personal details. Complaints are unverified owner reports.

1. Filed Oct 8, 2026TNEngineSteeringTransmission & Drivetrain

   The thermostat is malfunctioning along with engine temperature coolant sensor. This causes the temperature gauge on the dashboard to be completely disabled and not moving off cold, it disables the air conditioner, makes the engine cooling fan to run extremely high nonstop, and places the vehicle into an unpredictable limp mode or fail safe mode. This was identified as faulty by GM and they have issued a special service bulletin that they will repair it up to a 150,000 miles…

   NHTSA complaint #11769932 · source
2. Filed Oct 1, 2026ILEngine

   The radiator and thermostat on my 2020 Blazer had to be replaced at less than 35,000 miles. It was out of warranty and the Chevy dealer charged me $3,500 to replace them. Internet sources state that this is a common problem with this car. I complained to Chevy corporate and they refunded $1,000. I do not feel this was a fair settlement due to the fact that it is a common problem.

   NHTSA complaint #11768395 · source
3. Filed Sep 19, 2026PAElectrical SystemOther / UnknownTransmission & Drivetrain

   This happened back in May and the dealership couldn’t find anything wrong and it happened again today. I am driving and the car will shut off. A message pops up saying shift to neutral and press start again. It’s very dangerous and frustrating.

   NHTSA complaint #11765573 · source
4. Filed Sep 14, 2026FLElectrical System

   The contact owns a 2020 Chevrolet Blazer. The contact stated that while starting the vehicle, the brake pedal became inoperable. There was no warning light illuminated. The contact stated that excessive force was needed to depress the brake pedal to engage the START/STOP function to start the vehicle. The dealer was not contacted. The manufacturer was made aware of the failure by telephone.

   NHTSA complaint #11764039 · source
5. Filed Sep 14, 2026119,000 miOHEngine

   The contact owns a 2020 Chevrolet Blazer. The contact stated that while operating the vehicle, the check engine warning light intermittently illuminated, and the vehicle hesitated while accelerating. The vehicle was taken to the local dealer to be diagnosed, and the contact was informed that the catalytic converter needed to be replaced. The vehicle was not yet repaired. Additionally, while operating the vehicle, the engine temperature rose to HOT. The vehicle was taken to…

   NHTSA complaint #11764034 · source
6. Filed Sep 11, 2026INOther / Unknown

   The screen displayed shift to park. The car wouldn’t not recognize it was in park. Had to hit the shifter to get the car to recognize it was in park or it wouldn’t let you turn the car off. There was nothing other than the warning on the screen when we went to get gas and needed to turn the car off. It hasn’t been inspected by any of for this issue. I’m just afraid one day the car may roll if it doesn’t recognize it’s in park.

   NHTSA complaint #11763580 · source
7. Filed Sep 10, 2026MIElectrical System

   Vehicle: 2020 Chevrolet Blazer V6 System: Electronic Transmission Range Select (ETRS) – Gear Shifter / Park Engagement Concern Type: Potential Unintended Vehicle Motion / Failure to Confirm Park State Description of the Issue On the 2020 Chevrolet Blazer V6, the Electronic Transmission Range Select (ETRS) system fails to confirm that the transmission is in Park, even when the physical gear shifter lever is placed in the Park position. As a result The dashboard displays a…

   NHTSA complaint #11763452 · source
8. Filed Aug 27, 2026GAElectrical System

   Car is in park but the car alerts that it is not in park ( causing radio and light s to stay on ) - happens continually and from what I have heard from other people and mechanics - this is a known issue with Chevy

   NHTSA complaint #11759904 · source

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Source: U.S. National Highway Traffic Safety Administration (NHTSA) Office of Defects Investigation public data, as of Oct 10, 2026. Complaints are submitted by owners and are not verified by NHTSA or by us; a complaint does not prove a defect exists. View this vehicle on NHTSA.gov Methodology