well dude, im my site i have a tutorial on putting headunits in. Secondly, it the stock harness is in there, then get youself a harness kit and you wont have to worry about colors. If you or someone cut the wires, then theres a easy way to figure out the ground, acc and power. I can't remember color codes for my life, sorry.
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1991 Firebird (GT40)
-LO3 305 TBI
-5 speed
-Open Element Air Filter
-Edelbrock Tower Strut Brace
-Kenwood Excelon Headunit w/ 10 Disc Changer
-Alpine MRP-F256 Amp
-Polk EX 4x6's, DX 6x9's, and EX Tweeters
-Kicker ZR240 amp (bridged)
-Dual JL W0 12" Subs
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My page with pics and stuff, and car stereo help.
http://members.aol.com/deadtrend1/index.html