Need to unscrabble my radio code and get unlocked

Would need to remove the radio and call GM to unlock. There is a code on the top or bottom of the radio you need to give them. Also if you are not the original owner look in owners manual to see if is written in there. Factory code is 12345 try entering this as if was never changed you should be able to unlock with this. I think the 3 and 4 preset bottons are the up and down to get to the #'s. Thanks