[foamypirate]

For my dads 08' 1500 5.3L, in-city average is around 15.5mpg, highway average (2wd mode) is around 19-20mpg. I believe it has 3.73s, but not positive. Hit 10mpg pulling a heavy-as-all-get-out trailer with 4 snowmobiles on it through the mountains (in Utah).