Corsa 2002 Radio Code

[johnm]

Hi, anyone able to help me out with a code for a 2002 Corsa, original radio: GM020521310761

been searching for days, but only seem to find decoders full of trojans!

thanks for your help!

[johnm]

realized its not a standard 2002 stereo, its a CDR 2005 VDO - if thats any further use...