OK, my 05 CCSB Sierra is going to be needing new rear brakes soon. Since the morons at GM decided to revert back to drum brakes for a few years, mine is equipped with them. Instead of spending the money investing in brake shoes and turning the drums, I'm thinking of finding a factory rear disc setup. I'd like to find some from a newer model.

If I go this route, what all will I be looking at to make the switch?