I am looking to connect an mp3 player to my stock, non-bose headunit in my 07 base z.

I have heard that the 07 non bose headunit has an auxilary of some sort behind the headunit?

Please some shed some light on this, I don't want a new headunit...

 

I just installed a new Headunit in my car (07' enthusiast) and i can tell you for sure that there is NO auxillary output on the back of the headunit...you'll have to get a new Headunit if you want to play anything out of an auxillary slot.

 

I think what you are thinking about is the XM connection in the back of the headunit. I think I saw threads where you can use this as an aux connection.