petoworxExplorerMay 04, 2014mileage?hello all, in my 2006 gmc 2500 410 rear 4wd w lance 915 ive been getting around 12mpg for the past 6 yrs ,now im looking to upgrade to a 3500/f 350 maybe a diesil. just curious what kind of mileage a...Show More
805greggExplorerMay 04, 2014I just returned from a 2600 mile trip, and I got 12.5 MPG with a 3500 SRW Dodge Cummins diesel, and a 4000 lb Lance 1071