Hi i need color coded diagram to put this original unit back in the 2002 Chevy Impala. Had to buy new "OEM harness full pin GM 98-08" radio wiring harness because someone cut wires too close on stereo. Now I have new colors on different pins...very confusing. Has two connectors: one 24-pin and one 12-pin..original plug-ins used 16 wires and 2 wires. I cant find a diagram that uses 16 wires. Found one that uses 14 wires. Hope you can help.