I have an '06 2500HD that I've owned for about 3 yrs. I like the truck, but the milage is so bad, I can hardly stand it. It is an '06 Reg. cab, 6.0 gas, auto, 4.10 axle. Currently has 62,000 miles. Pulling my mowing trailer that weighs about 4500# it gets maybe 8.5 mpg. Pullingmy dump trailer, milage drops another mile per gallon to about 7-7.5. I have new michelen tires with proper inflation, and a K&N filter. The truck is not driven with a lead foot, and has minimal idle time. Just curoius what other owners are expirienceing for milage with these trucks.