Photo: GMC Sierra by Ethan Llamas, CC BY-SA 4.0, via Wikimedia Commons. It shows the model, not always this exact version.
GMC · model year 2005
2005 GMC Sierra 2500 HD 2WD CNG
Pickup · Rear-Wheel Drive · Natural gas · EPA class: Standard Pickup Trucks 2WD
EPA figures · 2005fueleconomy.gov
9MPG combined
8/11MPG city / highway
$5,150fuel a year
781 g CO₂ per mile 6.0 L 8-cyl Automatic 4-spd
This car on fueleconomy.gov, read 2 October 2026. Your own figures depend on how and where you drive.
Where it places
Every figure on record
- Combined MPG
- 9 MPG
- City MPG
- 8 MPG
- Highway MPG
- 11 MPG
- Annual fuel cost
- $5,150
- Tailpipe CO₂
- 781 g per mile
- Model year
- 2005
- Body
- Pickup
- EPA size class
- Standard Pickup Trucks 2WD
- Drive
- Rear-Wheel Drive
- Engine
- 6.0 L 8-cyl
- Transmission
- Automatic 4-spd
- Fuel
- Natural gas
Efficiency
Running cost
The car
Powertrain
More GMC model years
2005 GMC Sierra 1500 4WD
15 MPG · $4,450 fuel a year 2005 GMC Sierra 1500 4WD
15 MPG · $4,450 fuel a year 2005 GMC Sierra 1500 AWD
13 MPG · $5,150 fuel a year 2005 GMC Sierra 15 Hybrid 2WD
17 MPG · $3,950 fuel a year 2005 GMC Sierra 15 Hybrid 4WD
16 MPG · $4,200 fuel a year 2005 GMC Sierra 2500 Hd 2WD
11 MPG · $6,100 fuel a year 2005 GMC Sierra 2500 HD 4WD CNG
9 MPG · $5,150 fuel a year