2020 Buick Encore GX Fuel system Problems
- Complaints
- 4about this part
- Share
- 6%of 70 total for the year
- Median mileage
- 34miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 4 complaints about the fuel system of the 2020 Buick Encore GX, 6% of the 70 complaints for this model year. Where a mileage was given, the median is 34 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.
“Started having trouble last week with the fuel gauge and a check engine light. Took the car in to have it serviced and they found that rodents had chewed through the harness located by the fuel. Cost $850 to repair which was not covered under warranty. Had the car back two days and went to use the car and it completely stopped functioning once we pulled out into traffic. We live on a highly tractor trailer traveled road and having the car just stop working could have ended in an accident if a car was coming from either direction. …”
NHTSA complaint #11403516, filed 2021-03, 38 miles“Car has less than 30 (thirty) miles on it; garaged since purchase bc of pandemic; started occasionally; battery dead when I tried to go out last week; charged battery; died again; charged again; check engine light alerted onstar, who sent email stating problems w/engine & transmission system, possible issues w/fuel management system, emissions control, misfire condition... Only 30 miles! New car! Just drove home from dealership and parked it. Tried chatting w/Buick customer experience, but they cut me off 3 times over 2 hours, so I gave up that exercise in futility. …”
NHTSA complaint #11415944, filed 2021-05, 30 miles“I am submitting this complaint regarding several serious mechanical and electrical issues with my 2020 Buick Encore GX that raise significant concerns about the vehicle's reliability and safety. Most concerning, I was recently informed by the dealership that my vehicle requires another transmission replacement, despite having the transmission replaced in 2024. I was also advised that I would need to pay for an additional diagnostic inspection because technicians discovered oil leaking through the lines, which appears to have contaminated engine components. …”
NHTSA complaint #11752226, filed 2026-07“The contact owns a 2020 Buick Encore GX. The contact stated that while driving at an undisclosed speed, the vehicle failed to accelerate immediately and stalled. Additionally, the EPC warning light was illuminated. The vehicle was taken to the dealer, who informed the contact that the fuel pump needed to be replaced; however, the part to do the repair was not yet available. The manufacturer was not made aware of the failure. The failure mileage was unknown.”
NHTSA complaint #11513380, filed 2023-03Related 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.
- 11012961Jan 16, 2025This Preliminary information communicates a potential for dtc p0496 to fail due to damaged purge solenoid valve O-rings.
- 11012013Dec 16, 2024This Preliminary information communicates to the dealers diagnostic tips related to MIL on with P219A.
- 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…
Fuel system: other model years
Other parts of the 2020 Buick Encore GX
21 complaintsOther or unknown
19 complaintsTransmission and drivetrain
18 complaintsElectrical system
16 complaintsEngine
14 complaintsVehicle speed control
6 complaintsSteering
4 complaintsAir bags
3 complaintsEngine cooling
2 complaintsForward collision avoidance
2 complaintsBack-over prevention (rear camera)
1 complaintsExterior lighting
1 complaints
← All problems reported for the 2020 Buick Encore GX
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 30, 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