2020 Chevrolet Blazer Engine Problems
- Complaints
- 71about this part
- Share
- 32%of 224 total for the year
- Median mileage
- 15,000miles
- Trend
- RisingComplaints filed in the last 3 full calendar years are at least 25% higher than in the 3 years before.
NHTSA recorded 71 complaints about the engine of the 2020 Chevrolet Blazer, 32% of the 224 complaints for this model year. Where a mileage was given, the median is 15,000 miles. 1 of these say a crash was involved, according to the filers.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“In 2 occasions my vehicle came to a complete stop and turned off on me. I was thinking it was a safety feature but after the 2nd time I was concerned. Took it to dealership and they found nothing wrong with it. On another occasion I was leaving my house when my steering wheel got super hard and made it very difficult for me to turn the wheel. Took it to dealership and they found nothing wrong, according to them truck was perfectly fine.”
NHTSA complaint #11405615, filed 2021-03, 6,000 miles“P0128 code produced when scanned. Cooling fans on high. No ac. Steering Assist Warning. Had to replace the thermostat. ECM also replaced and caused the tire pressure sensors to fail and had to replace the tire sensors. There is a recall on models 2021 to 2025 but none on the 2020 for the thermostat. I have paid $3500.00 to have my vehicle fixed.”
NHTSA complaint #11738607, filed 2026-05“I was driving and steering reduced drive with caution notification and brake assist notification came on and then engine light and the temp gage went to cold and stayed there. My steering stiffened up making it hard to steer. This is a known problem with the Chevy blazers and it had to do with the thermostat needing replaced.”
NHTSA complaint #11749661, filed 2026-07“I bought this car brand new. 0 miles. I’ve had an oil leak fixed once in it. And now it’s leaking oil again. I have to have it put back in the shop and pay out of pocket once again for now fault of mine. The first time it was leaking from the cam shaft. This is ridiculous. I will also be filing a complaint with Chevy.”
NHTSA complaint #11710840, filed 2026-01“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, filed 2026-10Related service bulletins
- 11026017Jun 5, 2025This service bulletin provides information on replacing the intake manifold when the engine is replaced after severe internal engine damage.
- 11024485May 15, 2025The service bulletin advises the tech of a normal transmission shift condition and the delay in throttle response when the throttle plate is opened rapidly and advises the…
- 11020254May 7, 2025This service bulletin provides information to dealership personnel for new vehicles with less than 1,000 miles that may not pass California smog inspection or smog inspection in…
- 11019547Apr 22, 2025This service bulletin provides a procedure to test and replace the battery distribution fuse block if found the cause of the DTC and electric coolant pump inoperative.
- 11019543Apr 22, 2025This service bulletin provides diagnostic repair information to correct an oil leak in the engine.
- 11019503Apr 18, 2025This warranty administration bulletin provides policy information on vehicles outside of a California Emissions State who move to and register their vehicle in a California…
- 11017508Apr 3, 2025This service bulletin provides a procedure to add deadener to the batter tray bracket to correct customer concerns of a Service Engine Soon (SES), Reduced Power, Service Brake…
- 11017443Apr 2, 2025This service bulletin provides a repair procedure to correct a customer concern of a Malfunction Indicator Lamp (MIL) Illuminated - DTC P3055 Set.
- 11014634Mar 27, 2025This Preliminary information communicates the potential for condensation to freeze up inside the Crankcase Pressure Sensor causing dtc P04FB to set.
- 11017263Mar 25, 2025This bulletin advises the technician to flush the cooling system multiple times if oil has been found in the cooling system and replace the parts that may be contaminated due to…
Engine: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2025 | 3 | 9% |
| 2024 | 7 | 13% |
| 2023 | 12 | 27% |
| 2022 | 15 | 28% |
| 2021 | 42 | 30% |
| 2020 | 71 | 32% |
| 2019 | 40 | 21% |
| 2006 | 2 | 11% |
| 2002 | 3 | 1% |
| 2000 | 1 | 0% |
| 1999 | 2 | 0% |
| 1998 | 2 | 0% |
| 1996 | 1 | 0% |
| 1995 | 2 | 0% |
Other parts of the 2020 Chevrolet Blazer
78 complaintsTransmission and drivetrain
75 complaintsOther or unknown
57 complaintsSteering
43 complaintsBrakes
11 complaintsFuel system
5 complaintsLane departure
5 complaintsSuspension
4 complaintsVehicle speed control
4 complaintsAir bags
3 complaintsEngine cooling
3 complaintsForward collision avoidance
3 complaints
← All problems reported for the 2020 Chevrolet Blazer
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 27, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology