I have a '99 that I bought in Feb of 2001. With 4:10s at 70 I run about 2500 rpm and get about 17mpg. If I go 75 it drops to about 15.5mpg and thats loaded with people and gear while driving thru the smokies. Not many mods on mine yet. Love the truck.
Have fun!
Mike<br />\'99 K2500LT Sub 6.5TD,4:10 grs,8600#gvwr,Praise Dyno brakes,Amsoil Air Fltr,Fumoto Drn Valve,JK\'s Quick Heats,Home Made FSD Clr,LubeSpec oil clr lines, Amsoil bypass,hi idle switch,New Eng 6/02 due to oil clr line failure, Gear Vendor installed