My SUV is a 1993 Chevy Suburban K1500 4X4 and it gets 20 city and 25 highway and my friend has a 1995 GMC Sierra 1500 (same as my truck) and it gets a little better gas mileage but very close..Do u think that GM was thinking about the environment when they made these trucks? And my friends that have Fords and Chrysler vehicles get way less then me and my friend do but they are from the same years('91 to '99)