I have a 08 ltz 2wd with 6.2 and 6 speed.It has great power and I get an average of 16 mpg running mostly around city.I work 10 miles from my home.I took it to Hershey park last weekend and did some mountain driving and got 18 mpg including running thru Hershey.On the way there I averaged 21 mpg.I did not reset the mpg the whole time and when I got home,total was 18.Not bad.I also did not go over 65 on the way there but coming home I rolled 70-75.
Can't wait for BB to come back around to Maryland for a tune. We missed them last time.Truck has 113k miles on it,3/4 drop,solid white,painted running boards,emblems,handles,mirrors.no chrome.stock 20's and no mods.