ilko

There is a procedure to show the serial number on the display of the radio. Hold the TP button for a few secs, or something like that. Maybe someone else can chime in.

If that doesn't work get a set of radio removal keys off ebay to remove the radio and the sticker with the serial number will be on the side.

Diamond Monaco

actually i found it written on the back of the face plate. :/ but thanks anyways!!!