A perennial competitor to Ford's Power Stroke V8 and Ram's Cummins turbo diesel ... and GMC Sierra. Without official test results to reference, finding reliable 6.6 Duramax mpg ratings can be ...

The small but mighty Duramax four-cylinder engine used by the Chevrolet Colorado and GMC Canyon ... this Cummins diesel engine was capable of consistent fuel economy figures over 20 mpg.

GM has finally shoehorned the Duramax ... and GMC Savana heavy-duty van offerings. It not only improves power (250 hp/460 lb.-ft) but is estimated to improve gas mileage to 20.2 mpg, upping ...

In 2019, General Motors introduced the Duramax 3.0 diesel engine in its lineup ... on base models of the Chevy Silverado 1500 or GMC Sierra 1500, but certain packages offer the Duramax as a ...

The Chevrolet Silverado and Suburban, as well as the GMC Sierra and Yukon ... weight are just some of the things that can decrease mpg, giving the vehicle less than optimal performance.

GMC has also improved the horsepower and torque ratings of the optional Duramax turbo-diesel inline-six. Output for the diesel now comes in at 305 horsepower and 429 pounds-feet of torque.

A two-wheel drive with the enhanced 3.0-Liter Duramax Turbo-Diesel is your ideal choice for optimum fuel efficiency at 24 MPG city / 29 MPG highway. A four-wheel drive with the same Duramax is ...

What is the MPG of the 2024 GMC Sierra 1500? The 2024 GMC Sierra 1500 offers up to 18 MPG in city driving and 22 MPG on the highway for a combined rating of 20 MPG. These figures are based on EPA ...