The code is not on the radio...the code is to prevent thieves from taking the radio, why print it on the back of it then?

Follow what newgsrdriver said and they will search on your VIN for the code...but only if the radio is from your car and you are the owner.

The code is 5 digits and only uses the numbers 1, 2, 3, 4, 5, & 6.

When you buy the car you get a card that has the code printed on it.