Scanned the diagram for the bypassing the factory amplifier. While you might not have the adapter, it will tell you what color wire goes where and you can customize your settings as necessary.

Diagram

I highly recommend gettin ANY aftermarket HU and bypassing the factory amplifier. My 3 year old Pioneer smoked the factory HU/amp setup. Now I just need the sub...and some Infinity's in the doors...and...and...and...

Good luck.

Matthew W. Campbell-- bigMoney Racing
--1999 SVT #220 "NT4UA" /O.Z. Crono Evo\'s/ /Rear Deck Sub/ --1972 Chevrolet C/10 Custom Deluxe--1980 Camaro in fewer pieces--
"If I had invested...in IBM or something like that, I would certainly have been wealthy within a decade. Instead, I bought a Porsche...and got a life" Leon Mandel