2020 Chevrolet Blazer Fuel system Problems
- Complaints
- 5about this part
- Share
- 2%of 224 total for the year
- Median mileage
- 29,800miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 5 complaints about the fuel system of the 2020 Chevrolet Blazer, 2% of the 224 complaints for this model year. Where a mileage was given, the median is 29,800 miles. 1 of these say a crash was involved, according to the filers.
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.
“My car will be running fine but the lights on the AC panel wont work. My car will stop and shut down while driving. Ive taken it in for service and they told me my battery cabels were lose. The second time it happened I got a notification of low battery level and it shut off and will not start. I just replace the battery 2 years ago. The service department tested my battery and said it was fine”
NHTSA complaint #11735381, filed 2026-05“To Whom It May Concern, I am writing to formally file a complaint regarding ongoing and persistent issues with my 2020 Chevrolet Blazer. The vehicle has exhibited repeated problems that I believe may indicate a broader safety or mechanical defect, and I am requesting that the NHTSA investigate these concerns further. Since purchasing the vehicle, I have experienced the check engine light turning on and off repeatedly, without consistent resolution. …”
NHTSA complaint #11660419, filed 2025-05“I received a check engine light which i took to Bell tire for diagnosis. Here is there diagnosis Comments: The P01F0 code on a 2020 Chevy Blazer means the engine coolant temperature is below the normal operating range, often due to a stuck-open thermostat (or both thermostats in models with dual units), a faulty Engine Coolant Temperature (ECT) sensor, or low coolant, leading to poor fuel economy and potential wear; fixing it usually involves replacing the thermostat(s) or sensor after checking coolant levels and wiring. After that i took the vehicle to GM Dealership. …”
NHTSA complaint #11715555, filed 2026-02“6/12/2024 In Damon Parking lot in Rochester MN. Going less than 10 miles an hr- cars in front of me and behind me looking for a parking spot. Stop and go at times. Went to turn corner to go from one level to the next and my BLAZER took off like a bullet . No control over accelerated speed- hit outer cement wall and slammed into 2 parked empty SUVS. Could not go any farther. The 2 SUVs slammed into cement wall in front of them. Injuries to both my passenger and myself. I have no idea what happened - it was so fast- I do know I had no control over accelerated rate causing accident. …”
NHTSA complaint #11599228, filed 2024-07“The contact owns a 2020 Chevrolet Blazer. The contact stated that while refueling the vehicle, the contact removed the pump handle from the filler neck, and one of the fuel flappers detached. The contact was concerned about fuel leaking from the fuel tank. The vehicle was taken to the dealer, where it was diagnosed that the filler neck and fuel filler housing needed to be replaced; however, the fuel filler housing was on backorder. The vehicle was not repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 29,800.”
NHTSA complaint #11559855, filed 2023-12, 29,800 milesRelated service bulletins
- 11017173Mar 21, 2025This informational bulletin instructs the tech when fuel/fluid is needed to be tested and where it can be sent for analysis.
- 11007095Aug 7, 2024This bulletin provides information on the TOP TIER Detergent Gasoline Licensed Brands and the TOP TIER Diesel Fuel Licensed Brands that are recommended for use in all GM vehicles…
- 11004727Jun 29, 2024This service bulletin provides information for maintenance cleaning of the fuel injectors and gasoline detergent additive.
- 11004761Jun 28, 2024This service 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 or…
- 11002011Jun 4, 2024This informational bulletin explains to the tech on where to look for a possible concern with the rockers causing the MIL to illuminate.
- 10252107Mar 18, 2024This technical bulletin provides a procedure replace the tappet that is located on the fuel door.
Fuel system: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2025 | 1 | 3% |
| 2024 | 4 | 8% |
| 2023 | 3 | 7% |
| 2022 | 7 | 13% |
| 2021 | 18 | 13% |
| 2020 | 5 | 2% |
| 2019 | 2 | 1% |
| 2007 | 5 | 56% |
| 2006 | 11 | 58% |
| 2005 | 7 | 47% |
| 2004 | 1 | 2% |
| 2003 | 10 | 13% |
| 2002 | 22 | 9% |
| 2001 | 33 | 10% |
| 2000 | 84 | 14% |
| 1999 | 30 | 7% |
| 1998 | 29 | 4% |
| 1997 | 84 | 11% |
| 1996 | 36 | 3% |
| 1995 | 112 | 9% |
| 1994 | 45 | 7% |
| 1993 | 22 | 4% |
| 1992 | 11 | 4% |
| 1991 | 7 | 3% |
| 1989 | 4 | 11% |
| 1988 | 1 | 3% |
| 1987 | 3 | 10% |
| 1984 | 2 | 22% |
Other parts of the 2020 Chevrolet Blazer
78 complaintsTransmission and drivetrain
75 complaintsEngine
71 complaintsOther or unknown
57 complaintsSteering
43 complaintsBrakes
11 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 31, 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