I have a 2006 chevy impala 3.5 liter with a 4 (Big) plug wire harness - black-grey-blue (ecu)/ separate module blue connector......would I be able to swap that harness out to a 2007 monte carlo 3.5 with a 3 (big) plug wire harness. Black-grey- ecu. And a seprate.module - blue terminal....when I attempted to make the swap I also swapped key transponder, ecu, ignition cyclinder,.....will this work why or why not???