I'd rather not spend that much on a wiring harness if I don't have to. I have plenty of experience to tap into the factory harness. I don't plan to chop the harness, I just plan to tap into the wires before the clip that goes into the factory radio.
I don't care to keep onstar working for this. Basically, I just need to know what wires are what. So all I really need is 12v constant, 12v switch, ground, illumination, and speaker wires. I found the info on the wire colors, I was just hoping someone can confirm they are correct since I don't have a DMM. Also, it looks like LF+ speaker and RR- are the same color...
Car Radio Battery Constant 12v+ Wire: Red/White
Car Radio Accessory Switched 12v+ Wire: Run a primary wire from the back of your radio to your to the steering column and use the brown wire in the ignition switch harness.
Car Radio Ground Wire: Black/White
Car Radio Illumination Wire: Gray
Left Front Speaker Positive Wire (+): Tan
Left Front Speaker Negative Wire (-): Dark Green
Right Front Speaker Positive Wire (+): Light Green/White
Right Front Speaker Negative Wire (-): Light Green
Left Rear Speaker Positive Wire (+): Brown/White
Left Rear Speaker Negative Wire (-): Brown
Right Rear Speaker Positive Wire (+): Dark Blue
Right Rear Speaker Negative Wire (-): Tan