View detailed gas mileage data for the Chevrolet Silverado HD. Use our handy tool to get estimated annual fuel costs based on your driving habits. Find and Compare Cars ; Personalize · Find a car ; Bifuel Natural Gas. 8 cyl, L, Automatic 4-spd. Compare · Regular Gas. Combined MPG combined. city/. In comfort, reliability, fuel economy, design and value, you can't beat this truck. The Duramax Diesel with the Allison automatic transmission is incredible.
My 09 gmc duramax 4dr long box with a tuner and bigger exhaust gets mpg at 60 mph mpg at 70 unloaded and mpg at 80 mph. Towing up to 10k lbs i. Fuel Economy of GMC Vehicles ; Compare ; Combined MPG combined. city/highway. MPG. City MPG city. Highway MPG highway. gals/ miles ; Not. I had a same truck crew cab and could get about 16 mpg on average. When towing big trailer it went down to.
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We have an 03 Silverado with the Duramax/diesel combo and just went on a miles trip to the south. We averaged mpg overall, towing and solo. Solo at. But the average mileage of different models of Duramax is 20 mpg on the highways and 14 mpg in cities. Your mileage should be within this range. If your mileage. The turbocharged liter Duramax diesel delivers lb. ft., or a 12 percent advantage. And the gas engine doesn't reach its torque peak until 3, rpm. ryanmor24 - 12/24/ How do you get MPG with a Chevy HD LMM Duramax/Allison extended cab short bed, with rear end?