Quote Originally Posted by torqueaddict View Post
I don't have the button that says CD/AUX on my stereo so I was thinking mine doesn't have the plug needed but I'm not sure - and if I do decide to buy a used delco stereo I dont know which ones will work with my steering wheel controls and amp.
I'm trying to do the same thing and it seems to me options are pretty limited if you don't have a CD Changer/Aux input.

The best option if you want to keep the stock head unit seems to be adding an aux input to it, like this:

FACTORY REMANUFACTURED PONTIAC FIREBIRD 7 EQ CD RADIO - !! MP3 INPUT !! - | eBay


I emailed a couple of people selling them asking them how they wired it up, so far no reply.