Try this: http://www.grandprixforums.net/auxil...dio-61160.html Honestly, it is not worth the hassle. Why don't you replace the head unit with an aftermarket one? I remember there was a guy on ebay that did this mod, you had to send him you original radio and he will put the AUX port on it and ship it back to you. I sold him my OEM radio when I replaced mine. I tried to find him but I couldn't.

Best of luck

Regards!