My wife had a short wheel base 4WD Chevy P/U with the 4.8 engine and the automatic transmission with the tow/haul mode. She got a pretty consistent 24 mpg on the highway, and she has a pretty heavy foot. We traded it with about 150K hard miles on it, not because anything was wrong with it--she just thought that it was going to cost us some serious money after six years and all those miles.
