2020 Chevrolet Blazer Engine cooling Problems
- Complaints
- 3about this part
- Share
- 1%of 224 total for the year
- Median mileage
- 97,000miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 3 complaints about the engine cooling of the 2020 Chevrolet Blazer, 1% of the 224 complaints for this model year. Where a mileage was given, the median is 97,000 miles.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“The contact owns a 2020 Chevrolet Blazer. The contact stated that while driving at an undisclosed speed, the steering wheel became inoperable. The contact stated that the steering wheel became difficult to turn with a reduced steering message displayed. The vehicle was taken to the dealer, where it was diagnosed that the thermostat had failed, which caused the steering wheel to fail, and needed to be replaced. The vehicle was not repaired. The manufacturer was made aware of the failure. The approximate failure mileage was 54,000.”
NHTSA complaint #11664630, filed 2025-06, 54,000 miles“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 the local dealer, and the thermostat was replaced. The manufacturer was notified of the failure. …”
NHTSA complaint #11764034, filed 2026-09, 119,000 miles“The contact owns a 2020 Chevrolet Blazer. The contact stated while driving at approximately 55 MPH and driving up an incline in the road, the check engine warning light had illuminated. The contact stated that the vehicle was shuddering. The contact stated that the failure only occurred while driving uphill. The contact had only recently taken the vehicle to a local dealer because the check engine warning light was illuminated. The vehicle was diagnosed, and the dealer determined that the thermostat and the engine control sensor needed to be replaced. The vehicle was repaired. …”
NHTSA complaint #11661250, filed 2025-05, 97,000 milesRelated service bulletins
- 10251890Mar 13, 2024This technical bulletin advises of a new fuel injection cleaner kit used for decarbonizing the intake valves to correct conditions of rough idle, Crank no start, extended crank…
Engine cooling: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2024 | 2 | 4% |
| 2023 | 2 | 5% |
| 2022 | 1 | 2% |
| 2021 | 3 | 2% |
| 2020 | 3 | 1% |
| 2019 | 1 | 1% |
| 2008 | 1 | 20% |
| 2005 | 1 | 7% |
| 2004 | 4 | 8% |
| 2003 | 6 | 8% |
| 2002 | 20 | 8% |
| 2001 | 23 | 7% |
| 2000 | 63 | 11% |
| 1999 | 62 | 14% |
| 1998 | 64 | 9% |
| 1997 | 93 | 12% |
| 1996 | 149 | 13% |
| 1995 | 213 | 17% |
| 1994 | 42 | 7% |
| 1993 | 51 | 10% |
| 1992 | 9 | 3% |
| 1991 | 12 | 5% |
| 1990 | 5 | 16% |
| 1989 | 4 | 11% |
| 1988 | 7 | 18% |
| 1987 | 2 | 7% |
| 1986 | 5 | 26% |
| 1985 | 5 | 17% |
| 1984 | 1 | 11% |
Other parts of the 2020 Chevrolet Blazer
78 complaintsTransmission and drivetrain
75 complaintsEngine
71 complaintsOther or unknown
57 complaintsSteering
43 complaintsBrakes
11 complaintsFuel system
5 complaintsLane departure
5 complaintsSuspension
4 complaintsVehicle speed control
4 complaintsAir bags
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