2008 GMC Sierra C15 2WD
Fuel economy & running costsGasoline
#1004 of 2,900 · GMC cars

2008 GMCSierra C15 2WD

Standard Pickup Trucks 2WD · Rear-Wheel Drive · 4.8 L 8-cyl

16MPGcombined
14city
19highway
A year of fuel$4,200
CO₂ from the tailpipe555.4 g/mi
Figures from the EPA label (fueleconomy.gov), the same as on the car's window sticker.

Against the 2,900 GMC cars

Combined MPG 16 MPGbest 32 · avg 17
Annual fuel cost $4,200best $900 · avg $4,328

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

The 2008 GMC Sierra C15 2WD is a gasoline pickup with rear-wheel drive and an automatic 4-speed transmission. Its 4.8 L 8-cylinder engine is paired with an EPA combined rating of 16 MPG, with 14 MPG in city driving and 19 MPG on the highway. The EPA annual fuel cost is $4,200, and tailpipe CO2 is 555.44 g per mile. GMC classifies this configuration as a Standard Pickup Trucks 2WD. For buyers comparing pickup fuel use, the city and highway figures show how the combined rating breaks down, while the annual cost and emissions provide additional operating context. This entry is the Sierra C15 2WD configuration for model year 2008; its base model is the Sierra.

Who it is for

It suits buyers looking for a gasoline pickup with rear-wheel drive who want to compare fuel use and emissions. Its 16 MPG combined rating and $4,200 annual fuel cost are useful figures for running-cost comparisons.

What is good

  • Rear-wheel drive configuration
  • 19 MPG highway rating
  • Automatic 4-speed transmission

What to know first

  • 14 MPG city rating
  • 16 MPG combined rating
  • $4,200 annual fuel cost

Verdict

The 2008 Sierra C15 2WD pairs a 4.8 L V8 with rear-wheel drive and an automatic 4-speed transmission. Its EPA figures give buyers clear fuel-use, annual-cost and tailpipe-emissions measures to weigh.

Details

Model year
2008fueleconomy.gov · 3 Oct 2026

Efficiency

Combined MPG
16fueleconomy.gov · 3 Oct 2026
City MPG
14fueleconomy.gov · 3 Oct 2026
Highway MPG
19fueleconomy.gov · 3 Oct 2026

Running cost

Annual fuel cost
$4,200fueleconomy.gov · 3 Oct 2026
CO₂ (tailpipe)
555.4 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
4.8 L 8-cylfueleconomy.gov · 3 Oct 2026
Transmission
Automatic 4-spdfueleconomy.gov · 3 Oct 2026
Fuel
Gasolinefueleconomy.gov · 3 Oct 2026

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Sources