How to improve mpg

My daily is a 05 chevy z71 lifted 6 inches on 35's with 18's. Wondering what is the best way to increase the gas mileage?

lower it!

Dual electric fans. Expensive but probably the most bang for your buck that you will find.

ebay gots them electric fans for cheap...i paid like 80 bucks for 2 of em. but be sure you get the relay switch so there automatic.

There is a few things you could do and not in thie order or any oreder.#1 good air filter such as K&N or something like that#2 Good exhaust system, headers,cats, free flowing style of exhaust#3 Gears or a programer of some type were you can adjust tire size#4 Get rid of any junk that just sits in the truck(less weight to carry) #5 A bed cover of some type#6 Like above electric fansWith lifted trucks your not going to be getting great gas milage due to the amount of dirty air going under the truck and your pushing a lot of air because of the size of the lift but some of the above will net you a few MPG'S plus some power.