My First post! Just picked up a 2012 burb and about a week later found out i bought on with a 3.08 rear end, crap! Bought the truck for pulling my toys around, found out the 3.08 is rated at only 5000lbs....the 3.43 is rated at 8100lbs. So at the very least i would like to repalce to a 3.43, but would prefer a 3.73. Guestion is, how hard and expensive is it on the newer trucks. Any input would be appreciated.