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 2018
2018 GMC Sierra C15 2WD
Pickup · Rear-Wheel Drive · Gas · EPA class: Standard Pickup Trucks 2WD
EPA figures · 2018fueleconomy.gov
20MPG combined
18/24MPG city / highway
$3,350fuel a year
448 g CO₂ per mile 4.3 L 6-cyl Automatic 6-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
- 20 MPG
- City MPG
- 18 MPG
- Highway MPG
- 24 MPG
- Annual fuel cost
- $3,350
- Tailpipe CO₂
- 448 g per mile
- Model year
- 2018
- Body
- Pickup
- EPA size class
- Standard Pickup Trucks 2WD
- Drive
- Rear-Wheel Drive
- Engine
- 4.3 L 6-cyl
- Transmission
- Automatic 6-spd
- Fuel
- Gasoline
Efficiency
Running cost
The car
Powertrain
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18 MPG · $3,700 fuel a year