Solo mileage of Dura-max engine

[Coloradobus]

Anyone have good figures? I need to know what your solo mileage on an extended cab K-2500 Chevrolet/GMC equipped Duramax. We are thinking of clearing out the garage and using one vehicle for everything: towing/daily driver/grocery-getter/sunday cruiser.
I know towing will be a breeze, I really need non-towing city/highway figures. The manufacturer doesn't list mileage figures. Thanks in advance.

[Pahaska]

I get 14-15 towing my Classic 25.

Solo, I get 19-20 around town. Typical use is 6 miles of hilly country road, some city driving, and another 6 miles if hilly country road.

Solo, on the interstate, I have not measured, but the fuel gage sure does go down slow. Must be in the 20s.

I also will probably sell my Buick and use the truck as my lone ride.

[rcaldwel]

I can't help you on the chevy but as a starting point my 3/4 ton extended cab long bed 98.5 Dodge Cummins diesel with automatic gets between 22-23 solo and 16 pulling a 25' Safari.

Bob

[Dwight]

Solo to and from work in our '02 C-C dually D/A, we get 19-20. When coupled to our '99-34', we get 17-18 using 1800-1900 RPM.

[Cracker]

The model truck seems to make a significant difference. I've been watching similar threads for some time now. Before I switched to a winter blend I was getting about 17.5 to 18 mpg on the highway. Using a winter blended fuel my mileage has dropped about 1 mpg. One thing worth noting is that I live in Maine where a lot of my driving is up and down hills. I haven't turned 10,000 miles yet - and I understand that the Duramax just keeps getting better! Note that my rig is a crew-cab, 4X4, long-bed dually. These mpg figures are long-term, using the "personal" and "business" functions on the computer. I've also manually checked the results - not wanting to totally rely on the on-board computer. The results were identical. I haven't had the opportunity to do any extensive towing yet, thanks to Old Man Winter! My results have been consistently lower than what others have reported - but I'm not complaining. This is the smoothest-running vehicle I've ever owned - in spite of it being a diesel. I probably need to push it a bit just to loosen things up!

[bswaslien@aol.com]

I get about 16mph empty, but I only have 1800 miles on my 2004 crew cab dualie 4x4, much better than my Hummer. I sold the H2,in order to have a means of carrying my Harley on trips. The hummer was fun for the 18,000 miles I put on it in one year, but I'm a true dualie fan.

[Janets Husband]

I have a 03, 2500hd extended cab Duramax with the Allison,
I get about 18 average around town and towing about 14 to 15mpg pulling a 7800# equipment trailer. Pulling my 6meter Minuet at 2700# I get about 18 average. I only have 10k miles and the milage keeps getting better.

[Midamrail]

My dad had an '01 extended cab shortbed 4x4 LT with the Duramax that he used for delivering travel trailers, and he averaged about 14 pulling and between 21-23 empty on the highway. He did very little in-town driving but figured he got around 15 in town.

He had an accident while towing and gave up the truck. He went back to a gas and really, really misses the Duramax. We're Ford people, and even we thought it was a great truck!