2008 GMC Sierra Denali Fuel system Problems
- Complaints
- 1about this part
- Share
- 6%of 18 total for the year
- Median mileage
- 3,000miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 1 complaints about the fuel system of the 2008 GMC Sierra Denali, 6% of the 18 complaints for this model year. Where a mileage was given, the median is 3,000 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.
“2008 Gmc Sierra Denali has intermittent fuel gauge operation. After filling up the vehicle while driving the fuel gauge needle will drop from full tank indication to empty tank indication even thought the tank is fuel of fuel. The dealer has removed the tank and replaced the fuel sending unit, but has not resulted in a fix just an educated guess. Also in the mornings the vehicle experiences a very loud knocking noise which when confronted at the dealer was told that this was a normal noise. Occurs everyday in the morning and when leaving work in the afternoon.”
NHTSA complaint #10258312, filed 2009-02, 3,000 milesRelated service bulletins
- 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…
- 10250505Feb 7, 2024This service bulletin provides information on the cold start control system in DI engines to reduce cold start emissions and improve fuel economy.
- 10241417Aug 1, 2023This service bulletin provides information for maintenance cleaning of the fuel injectors and gasoline detergent additive.
- 10222766Sep 16, 2022This 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…
- 10222765Sep 14, 2022This service bulletin provides the technician with additional information on fuels, fuel additives and fuel management.
- 10222739Sep 13, 2022This service bulletin provides information for maintenance cleaning of the fuel injectors and gasoline detergent additive.
- 10222736Sep 13, 2022This service bulletin provides information on availability of Diesel Fuel additives.
- 10222773Sep 12, 2022This informational bulletin provides information on Clean Exhaust Filter See Owners Manual Now or Cleaning Exhaust Filter Keep Driving Until Message is Cleared messages Displayed…
Fuel system: other model years
Other parts of the 2008 GMC Sierra Denali
6 complaintsAir bags
3 complaintsOther or unknown
3 complaintsElectrical system
2 complaintsBrakes
1 complaintsElectronic stability control
1 complaintsExterior lighting
1 complaintsLatches, locks and linkages
1 complaintsVisibility (wipers, defrost, mirrors)
1 complaintsWheels
1 complaints
← All problems reported for the 2008 GMC Sierra Denali
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