GMC Sierra 2500 HD 2WD CNG MPG and Fuel Economy
GMC have been manufacturing models of Sierra 2500 HD 2WD CNG for 1 year, with the latest vehicle in 2005 having a combined MPG of 9.
The estimated fuel cost for the 2005 GMC Sierra 2500 HD 2WD CNG is $3,900 per year.
Government regulators have estimated that value based on 15,000 miles driven per year, using regular gasoline, and a split of 55% city driving and 45% highway driving.
💵 Compared to an average vehicle over 5 years, you will spend $8,000 more on fuel driving a 2005 GMC Sierra 2500 HD 2WD CNG.
🛢 The GMC Sierra 2500 HD 2WD CNG will consume roughly 0 barrels of petroleum per year, using the standard estimate of 15,000 miles per year.
💨 For every mile driven, the GMC Sierra 2500 HD 2WD CNG will emit -1 grams of CO2, which is about -15,000 grams of CO2 per year.
🌳 To help you understand the impact of this, a normal tree will absorb around 21,000 grams of CO2 per year. This means that roughly 1 tree would be needed to offset emissions from the GMC Sierra 2500 HD 2WD CNG.
The table below is a complete list of the 1 GMC Sierra 2500 HD 2WD CNG fuel efficiency specifications we have data for.
Click any vehicle link to see a more detailed breakdown of the car, miles per gallon, emissions, and more.
| Vehicle | Combined MPG | Fuel Cost |
|---|---|---|
| 2005 GMC Sierra 2500 HD 2WD CNG | 9 | $3,900 |
Link To or Reference This Page
If you use this page in your research, please reference MPG Buddy as the source.
<a href="https://mpgbuddy.com/cars/gmc/sierra-2500-hd-2wd-cng">GMC Sierra 2500 HD 2WD CNG MPG and Fuel Economy</a>
"GMC Sierra 2500 HD 2WD CNG MPG and Fuel Economy." MPG Buddy. Accessed on January 3, 2026. https://mpgbuddy.com/cars/gmc/sierra-2500-hd-2wd-cng.
"GMC Sierra 2500 HD 2WD CNG MPG and Fuel Economy." MPG Buddy, https://mpgbuddy.com/cars/gmc/sierra-2500-hd-2wd-cng. Accessed January 3, 2026.
GMC Sierra 2500 HD 2WD CNG MPG and Fuel Economy. MPG Buddy. Retrieved from https://mpgbuddy.com/cars/gmc/sierra-2500-hd-2wd-cng.