The code certainly was on ours, although it was a Ford Focus factory fitted piece of shit that would only play Heart FM. It was honestly like fvcking Christine, you'd wake up in the middle of the night to hear Chesney fvcking Hawkes' The One and Only blaring out and all the garage lights would...
If memory serves, isn't the pin on the back of most car radios/stereos? I recollect using the ends of an opened out coat hanger to eject the radio to get the code, job done.