Thermostat and temperature faults
The 2020 Blazer has about 240 complaints per 100,000 sold. Steering assist warnings, Shift to Park messages and engine temperature faults lead.
Updated November 2026 · based on 224 owner complaints and 3 recalls
237 close to the Blazer average
3 free to fix at a dealer
Every Blazer year compared
Owner complaints per 100,000 cars sold. Lower is better. The newest years have had less time to collect complaints, so they are marked too new to judge.
Top problems and what they cost
Thermostat housing
Temperature gauge stops working and the fan runs hard.
Fix: Thermostat $300 to $600
Engine
Recalls
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.
If the diffuser separates from the inflator during deployment, RRAB performance may be degraded, increasing the risk of injury in a crash.
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...
Complaints by part
Before you buy a 2020 Chevrolet Blazer
- Watch the temperature gauge.Coolant keeps the engine from overheating. A dropping level, drips, white smoke or residue can mean leaks or a failing head gasket, which can ruin the engine.71 of the 224 owner complaints about the 2020 Blazer involve the engine and cooling system (32%).
- Check by VIN for open recalls.A recall is a safety fix the carmaker must do for free, even for later owners. Typing the 17-character VIN (on the dashboard and driver door) into nhtsa.gov/recalls shows any that were never done. Codes like 18V332 are recall numbers.The 2020 Blazer has 3 recalls on record, listed below.
Questions
Is the 2020 Chevrolet Blazer reliable?
Thermostat and temperature faults. The 2020 Blazer has about 240 complaints per 100,000 sold. Steering assist warnings, Shift to Park messages and engine temperature faults lead.
How many recalls does the 2020 Chevrolet Blazer have?
3 recalls. Recall repairs are free at any Chevrolet dealer, even for later owners. Enter the VIN on the free government recall lookup to see which are still open on a specific car.
What are the most common 2020 Chevrolet Blazer problems?
Thermostat housing.
Crash rating shown for the 2020 Chevrolet Blazer SUV AWD. Repair costs are typical U.S. ranges for parts and labor, not quotes. How we score.