Ok guys im sure this may hv been hit before but as you may or may not no i hv a 17 z71 1500 with the 4.3, now ive seen people ask about swapping in the 5.3s and the majority always says it be cheaper to buy a new truck , but ive found a couple trucks with fairly low mileage with 6.2 plus tranny and wiring (wrecked) now i can do the mechanical work myself. These trucks are usually a yr or 2 older than mine but very reasonably priced 3500-5000 , i cant see how buying a new truck would be cheaper than putting 6grand ( xtra parts that may neef) on a truckni already own