The code was originally printed on a small cardboard "Radio Pass" card that came in the glovebox. 30 years later, that card is almost always lost. The previous owner didn't hand it over. The sticker on the radio chassis has faded.

, you can often retrieve it by pressing , then 8 and 0 simultaneously. Use the station up arrow to scroll until "SERIAL N" appears.

You usually need to remove the radio from the dashboard to find the serial number. Identification