Quote Originally Posted by black04z71 View Post
04 z71 w/ 3.73 gears and 33 on 20s I am getting about 9-10 mpgs what can i do to fix this mpgs were about the same with the factory rims and 285s
You have to work hard to get mileage that low. Are you the first guy to the next stop light all the time? I've had my foot buried in the gas pedal for long periods of time and never even approached your mpg's. Did you get a bad tune or something?