Save yourself the headache and DO NOT cut out the factory harness (unless it is too late)! Get to Crutchfiled.com or a local stereo place (even a auto parts store) and spend the 13 bucks on the harness adaptor. You will need to go to one of these places anyway as you will need a GM Mini to standard antenna adaptor.
If it is too late, here you go
Left Front Spkr (-) Light Gray White w/ Black Stripe Left Front Spkr (+) Tan White Right Front Spkr (-) Light Green Gray w/ Black Stripe Right Front Spkr (+) Dark Green Gray Ground Wire Black Black Headlight Dimmer Wire Gray Orange (if available) Power Antenna Turn On Pink (if available) Blue
+12 Volt Ignition Wire Yellow Red +12 Volt Battery Wire Orange Yellow Right Rear Spkr (-) Light Blue Purple w/ Black Stripe Right Rear Spkr (+) Dark Blue Purple Left Rear Spkr (-) Yellow Green w/ Black Stripe Left Rear Spkr (+) Brown GreenLook at
You will find exactly what you need with pictures, pinouts, etc.
I hope this helps. Andrew.
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