as everyone should know that the cobalt ss/sc comes stock with the custom pioneer upgrade sound system... i need help i have a 2007 cobalt ss/sc and what to junk the radio and put a navigation unit (avic-d3) and a back-up camera (nd-bc2) and xm navtraffic (b/c the factory get deleted )... well what i am trying to say is i am missing to parts to make it work the filler kit and the i am starting to not want to do this projects bc of all the hear say about wiring the new unit. PLEASE HELP!!!