What PAC harness do you have? I put a GMOS-01 in my truck, but I couldn't get the onstar to work. So I'm looking at buying a new harness for my truck. It came with a Bose system in it, but I added a aftermarket head unit, amps, door speakers, and subs. So I'm not sure if I need a Bose harness or a non Bose harness.