I have a 2006 5.3 crew cab chevy with 3:23 gears and 22" billet wheels that weigh almost asmuch as my stocks.
My question is how much of a difference will it do if i get 4:10 installed on it and if i will see any gas millage improvements?

 

DO IT

I changed from 3.23's to 4.10's and i have never been happier with a mod, mad the truck 100x better, easier on the wallet to, my in city mileage climbed to 15-16ish and my highway mileage stayed around 20