MPG & Fuel Economy Data
The 2025 GMC Sierra 2WD has an estimated 26.0 MPG combined. This diesel-powered vehicle offers 23.0 MPG in the city and 29.0 MPG on the highway. Check out its full EPA-estimated fuel economy data below.
Combined26.0 MPG
City23.0 MPG
Highway29.0 MPG
CO₂ Emissions399 g/mi
GHG Score5/10
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With a Greenhouse Gas Score of 5/10, the 2025 GMC Sierra 2WD shows average environmental performance in its class. This score suggests typical greenhouse gas emissions for vehicles in this category.
The vehicle produces approximately 399 grams of CO₂ per mile under typical driving conditions. Consider more fuel-efficient alternatives if environmental impact is a priority.
This standard pickup trucks 2wd features a 3.0L 6-cylinder engine, paired with a automatic 10-spd transmission and rear-wheel drive drivetrain. It includes start-stop technology to improve fuel efficiency in city driving conditions. Plus it has a turbocharged engine for improved power and efficiency.
To achieve the best fuel economy in your 2025 GMC Sierra 2WD, consider these tips:
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This Fuel Savings Calculator tool is provided for informational and educational purposes only. The MPG data used is sourced from the U.S. Environmental Protection Agency (EPA), an official government resource, and while efforts are made to ensure accuracy, discrepancies or updates may occur. Calculations are based on standard assumptions and estimates, which may not reflect individual circumstances or real-world conditions. Users are responsible for verifying results with their own data and should consult additional resources or/and professionals for critical decisions. This tool is provided "as is" without warranties of any kind, and the developers disclaim any liability for decisions or actions taken based on its output. The tool may be updated or modified without notice, affecting its functionality or results. By using this tool, you acknowledge and agree to these terms.
The 2025 GMC Sierra 2WD with auto 8-spd has an estimated 19.0 MPG combined. This auto 8-spd regular gasoline-powered vehicle offers 18.0 MPG in the city and 21.0 MPG on the highway.
Combined19.0 MPG
City18.0 MPG
Highway21.0 MPG
CO₂ Emissions468 g/mi
GHG Score4/10
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When using regular gasoline, the 2025 GMC Sierra 2WD with auto 8-spd has a carbon footprint of 468 grams of CO₂ per mile. Its Greenhouse Gas Score of 4/10 indicates its relative environmental impact, with higher scores representing lower emissions.
These environmental metrics reflect the vehicle's efficiency in auto 8-spd configuration. The CO₂ emissions measurement provides a direct indicator of the vehicle's contribution to greenhouse gases, while the GHG score offers a standardized comparison with other vehicles in its class.
This variant includes start-stop technology, which can help reduce emissions and fuel consumption during city driving by automatically shutting off the engine when the vehicle is stationary.
This standard pickup trucks 2wd with auto 8-spd features a 2.7L 4-cylinder engine and rear-wheel drive drivetrain. It includes start-stop technology to improve fuel efficiency in city driving conditions. And it has a turbocharged engine for improved power and efficiency.
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The 2025 GMC Sierra 2WD with auto 8-spd has an estimated 19.0 MPG combined. This auto 8-spd regular gasoline-powered vehicle offers 17.0 MPG in the city and 21.0 MPG on the highway.
Combined19.0 MPG
City17.0 MPG
Highway21.0 MPG
CO₂ Emissions470 g/mi
GHG Score4/10
*As an Amazon Associate, we earn from qualifying purchases.
When using regular gasoline, the 2025 GMC Sierra 2WD with auto 8-spd has a carbon footprint of 470 grams of CO₂ per mile. Its Greenhouse Gas Score of 4/10 indicates its relative environmental impact, with higher scores representing lower emissions.
These environmental metrics reflect the vehicle's efficiency in auto 8-spd configuration. The CO₂ emissions measurement provides a direct indicator of the vehicle's contribution to greenhouse gases, while the GHG score offers a standardized comparison with other vehicles in its class.
This variant includes start-stop technology, which can help reduce emissions and fuel consumption during city driving by automatically shutting off the engine when the vehicle is stationary.
This standard pickup trucks 2wd with auto 8-spd features a 2.7L 4-cylinder engine and rear-wheel drive drivetrain. It includes start-stop technology to improve fuel efficiency in city driving conditions. And it has a turbocharged engine for improved power and efficiency.
*As an Amazon Associate, we earn from qualifying purchases.
26.0 MPG
View detailed fuel economy data
25.0 MPG
View detailed fuel economy data
25.0 MPG
View detailed fuel economy data
These vehicles are in the same class (Standard Pickup Trucks 2WD) and offer comparable fuel economy ratings.