hey im putting my old cd player in (still wiring it up) the stock tape player is somewhere in my car im gona look again today but when i pluged the si cd player in it threw a code on the cd player what do i need 2 do.... i dont have the manual

 

You need the security code to unlock it.

 

Call up the manufacturer of your player and see if they have some advice for you and more than likely with the correct information they will be able to give you the security code