2008 GMC Sierra Specs, MPG & Trims
EPA fuel-economy data and specifications for the 2008 GMC Sierra (14–17 MPG combined) across 10 listed configurations.
Overview
- Body class
- Standard Pickup Trucks 2WD, Standard Pickup Trucks 4WD
- Drive
- Rear-Wheel Drive, 4-Wheel or All-Wheel Drive
- Transmissions
- Automatic 4-spd, Automatic 6-spd
- Engine
- 6-cyl, 4.3 L; 8-cyl, 4.8 L; 8-cyl, 5.3 L; 8-cyl, 6.0 L; 8-cyl, 6.2 L
- Fuel type
- Regular Gasoline, Premium Gasoline
- Combined MPG
- 14–17 MPG
- Annual fuel cost
- $3,950–$5,850
- 5-year fuel cost
- −$17,250 to −$7,750 more than average
- Configurations
- 10
MPG & fuel economy
City, highway and combined values below are EPA estimates. Where a powertrain has several configurations, the table shows the lowest–highest reported value. Electric configurations use MPGe.
| Powertrain | City | Highway | Combined | Annual fuel cost | CO2 |
|---|---|---|---|---|---|
| 8-cyl 6.2 L · Premium Gasoline · 4-Wheel or All-Wheel Drive | 12 | 18 | 14 | $5,850 | — |
| 8-cyl 6.2 L · Premium Gasoline · Rear-Wheel Drive | 12 | 19 | 15 | $5,500 | — |
| 6-cyl 4.3 L · Regular Gasoline · 4-Wheel or All-Wheel Drive | 14 | 18 | 15 | $4,450 | — |
| 8-cyl 4.8 L · Regular Gasoline · 4-Wheel or All-Wheel Drive | 14 | 18 | 16 | $4,200 | — |
| 8-cyl 5.3 L · Regular Gasoline · 4-Wheel or All-Wheel Drive | 14 | 19 | 16 | $4,200 | — |
| 8-cyl 6.0 L · Regular Gasoline · 4-Wheel or All-Wheel Drive | 13 | 17 | 14 | $4,800 | — |
| 6-cyl 4.3 L · Regular Gasoline · Rear-Wheel Drive | 15 | 20 | 17 | $3,950 | — |
| 8-cyl 4.8 L · Regular Gasoline · Rear-Wheel Drive | 14 | 19 | 16 | $4,200 | — |
| 8-cyl 5.3 L · Regular Gasoline · Rear-Wheel Drive | 15 | 20 | 17 | $3,950 | — |
| 8-cyl 6.0 L · Regular Gasoline · Rear-Wheel Drive | 13 | 18 | 15 | $4,450 | — |
Configurations & engine comparison
Each row is one configuration/engine combination reported by the EPA for this model year. Missing EPA values are shown as —.
| Configuration / engine | Drive | Transmission | Cyl. | Displ. (L) | Fuel type | City | Hwy | Comb. | Annual cost | 5-YR COST | FE | GHG |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sierra C15 2WD | Rear-Wheel Drive | Automatic 4-spd | 6 | 4.3 | Regular Gasoline | 15 | 20 | 17 | $3,950 | −$7,750 | — | — |
| Sierra C15 2WD | Rear-Wheel Drive | Automatic 4-spd | 8 | 4.8 | Regular Gasoline | 14 | 19 | 16 | $4,200 | −$9,000 | — | — |
| Sierra C15 2WD | Rear-Wheel Drive | Automatic 4-spd | 8 | 5.3 | Regular Gasoline | 15 | 20 | 17 | $3,950 | −$7,750 | — | — |
| Sierra C15 2WD | Rear-Wheel Drive | Automatic 4-spd | 8 | 6.0 | Regular Gasoline | 13 | 18 | 15 | $4,450 | −$10,250 | — | — |
| Sierra C15 2WD | Rear-Wheel Drive | Automatic 6-spd | 8 | 6.2 | Premium Gasoline | 12 | 19 | 15 | $5,500 | −$15,500 | — | — |
| Sierra K15 4WD | 4-Wheel or All-Wheel Drive | Automatic 4-spd | 6 | 4.3 | Regular Gasoline | 14 | 18 | 15 | $4,450 | −$10,250 | — | — |
| Sierra K15 4WD | 4-Wheel or All-Wheel Drive | Automatic 4-spd | 8 | 4.8 | Regular Gasoline | 14 | 18 | 16 | $4,200 | −$9,000 | — | — |
| Sierra K15 4WD | 4-Wheel or All-Wheel Drive | Automatic 4-spd | 8 | 5.3 | Regular Gasoline | 14 | 19 | 16 | $4,200 | −$9,000 | — | — |
| Sierra K15 4WD | 4-Wheel or All-Wheel Drive | Automatic 4-spd | 8 | 6.0 | Regular Gasoline | 13 | 17 | 14 | $4,800 | −$12,000 | — | — |
| Sierra K15 AWD | 4-Wheel or All-Wheel Drive | Automatic 6-spd | 8 | 6.2 | Premium Gasoline | 12 | 18 | 14 | $5,850 | −$17,250 | — | — |
Frequently asked questions
What is the combined MPG of the 2008 GMC Sierra?
According to EPA data, the 2008 GMC Sierra is rated at 14–17 MPG combined for its conventional-fuel configurations.
How many cylinders does the 2008 GMC Sierra have?
The EPA data lists 6 and 8 cylinders across its configurations.
What fuel type does the 2008 GMC Sierra use?
It is offered with Regular Gasoline and Premium Gasoline.
What is the annual fuel cost of the 2008 GMC Sierra?
The EPA estimates annual fuel costs ranging from $3,950 to $5,850.
How much will the 2008 GMC Sierra cost in fuel over 5 years?
According to EPA estimates, the 2008 GMC Sierra 5-year fuel-cost difference is −$17,250 to −$7,750 relative to the average new vehicle (negative values mean the vehicle costs more than average).