Suburban-boss

I have an 03 chevy suburban with the Bose not onstar and I had a pioneer head unit put in and it totally srewed my whole data system but when the aftermarket wiring harness was removed the whole thing worked again can annoys explain this to me and can I put the radio back in with out the warning chime box and just wire the power plug to the stock plug or no help me please tired of the silence in my truck