2020 Chevrolet Blazer Reliability Score & Common Problems

Owners of the 2020 Chevrolet Blazer frequently report issues related to the electrical system, particularly involving the vehicle's thermostat and "Shift to Park" functionality. Common symptoms include the temperature gauge reading cold, air conditioning failure, engine fans running continuously, and messages indicating steering assist reduction. Multiple complaints also describe issues where the vehicle fails to recognize it is in park, preventing the car from turning off, which can drain the battery and pose a safety risk if the car rolls unexpectedly. These problems often occur without warning and have been noted by some owners at various mileages, including high mileage around 92,000 miles. Safety implications include potential loss of engine temperature monitoring and unintended vehicle movement.

Owners report frequent issues with the thermostat and coolant temperature sensor in the 2020 Chevrolet Blazer, often accompanied by error code P0128. Typical symptoms include the engine cooling fan running at full speed, the air conditioning and temperature gauge becoming non-functional, and warnings about reduced steering assist. These problems commonly arise around 50,000 to 67,000 miles, with some occurring as early as 16,000 miles. Safety implications are noted, as the combination of steering assist reduction and potential overheating could pose risks while driving. Additionally, multiple owners mention recurring oil leaks, particularly from the camshaft housing, contributing to further reliability concerns.

Owners of the 2020 Chevrolet Blazer report issues primarily related to the suspension, specifically involving the ball joint and control arm on the left side seizing, which can lead to axle shaft snapping and wheel misalignment. Typical symptoms include a loud clunking noise when driving over bumps and sudden vehicle stoppage as if hitting an obstruction, with one incident resulting in a crash and injury. Complaints highlight that these problems can manifest early, with one vehicle having only 1,300 miles. The described issues pose significant safety risks, including potential loss of control and vehicle non-drivability. These patterns suggest prospective buyers should be cautious of suspension integrity and inspect for any unusual noises or resistance in steering.

Owners of the 2020 Chevrolet Blazer frequently report issues with the original Continental CrossContact LX Sport tires, specifically related to unusual tread wear. Symptoms include a sensation of instability while driving, described as feeling like the car is "on marbles," and rapid tread wear, with some owners noting tread depths as low as 2/32 inches at around 18,000 miles. Safety concerns are highlighted, with reports of reduced traction on wet roads and the potential risk of accidents. The complaints suggest that the tires may require replacement sooner than expected, which could be a consideration for used car buyers evaluating tire condition and replacement costs.

Owners of the 2020 Chevrolet Blazer report issues with airbag non-deployment during crashes. In both documented cases, airbags fail to deploy despite significant impacts, with one incident occurring at approximately 50 mph and another involving a collision with a semi-truck at 65 mph. Both incidents result in injuries, including neck and spinal injuries, and require medical attention. These complaints involve vehicles with mileage around 72,000, suggesting potential concerns for buyers considering used models with similar mileage. The lack of airbag deployment during crashes poses a safety risk that prospective buyers should be aware of.