does any one got the part number for the whole rear floor section form gmpartsdirect.com? im comparing prices..im still not sure if this is a good idea..(to be spending this kinda money on this truck) but i suppose you gatta spend a little to get anywere right!1? ..but does anyone know the part number? thanx!! if i didnt need the bottom support chanles too...i proboly wouldnt get this..but i do..and i guess it has them already on it!?