Audio wiring is as follows...


Gm uses a pretty standerd wiring setup for audio. Both my Chiltons and my Haynes show this:

Rear

D-side
Dark Brown = POS
Yellow = NEG

P-side
Dark Blue = POS
Light Blue = NEG


Front

D-side
Tan = POS
Gray = NEG

P- side
Dark Green = NEG
Light Green = POS

Black = GROUND
Orange = 12 V POS BAT
Yellow = 12 V POS SWITCH