It may help if you stated which radio you bought, however most people
won't help with retrieving codes, as we don't know if the radio was bought
or stolen. Try e-mailing the seller, or taking it to a local dealership. One
thing I do know is if it is a newer radio from a GM car (2000+ I think) then
you can't retrieve the code, as the radio is programmed into the vehicle's
VIN, and you have to take it to the dealership.