Fuel economy & running costsNatural gas
#1218 of 2,900 · GMC cars
2005 GMCSierra 2500 HD 2WD CNG
Standard Pickup Trucks 2WD · Rear-Wheel Drive · 6.0 L 8-cyl
9MPGcombined
8city
11highway
A year of fuel$5,150
CO₂ from the tailpipe781.1 g/mi
Figures from the EPA label (fueleconomy.gov), the same as on the car's window sticker.
Against the 2,900 GMC cars
Bars are scaled to the best in the list; the mark shows the list average. Lower is better for fuel cost; higher is better for the rest. All figures are the EPA's.
Summary
2005 GMC Sierra 2500 HD 2WD CNG by GMC. The figures below are from US EPA fueleconomy.gov, with the page each one came from.
Details
- Model year
- 2005fueleconomy.gov · 3 Oct 2026
Efficiency
- Combined MPG
- 9fueleconomy.gov · 3 Oct 2026
- City MPG
- 8fueleconomy.gov · 3 Oct 2026
- Highway MPG
- 11fueleconomy.gov · 3 Oct 2026
Running cost
- Annual fuel cost
- $5,150fueleconomy.gov · 3 Oct 2026
- CO₂ (tailpipe)
- 781.1 g/mifueleconomy.gov · 3 Oct 2026
Car
- Body
- Pickupfueleconomy.gov · 3 Oct 2026
- EPA class
- Standard Pickup Trucks 2WDfueleconomy.gov · 3 Oct 2026
- Drive
- Rear-Wheel Drivefueleconomy.gov · 3 Oct 2026
Powertrain
- Engine
- 6.0 L 8-cylfueleconomy.gov · 3 Oct 2026
- Transmission
- Automatic 4-spdfueleconomy.gov · 3 Oct 2026
- Fuel
- Natural gasfueleconomy.gov · 3 Oct 2026
More GMC cars
See the list
#1 2027 · GMC Acadia AWD 21Combined MPG $3,200Fuel / year #2 2027 · GMC Acadia FWD 22Combined MPG $3,050Fuel / year 
#3 2027 · GMC Terrain AWD 25Combined MPG $2,700Fuel / year #4 2027 · GMC Terrain AWD Denali/AT4 25Combined MPG $2,700Fuel / year #5 2027 · GMC Terrain FWD 26Combined MPG $2,600Fuel / year 
#6 2027 · GMC Yukon 2WD 17Combined MPG $3,950Fuel / year Listed on CarCody
- GMC Cars: Every Model and Year With MPG2900 listed
Sources
- fueleconomy.gov/feg/noframes/21529.shtml· checked 3 Oct 2026