Cdr 2005 safe

Hi All,
My car battery needed to be jump started yesterday but the radio reset and is now in SAFE mode, i have the serial number GM020532837256 what else do i need to unlock it without having to go to the gangsters in the dealership:Moon:

thanks in advance

First off, do you know your radio code ?
If you leave your radio on the SAFE mode should change to CODE after 10 to 20 minutes, depending on how many attempts of the radio code your have left (if the code has been tried 10 times then the radio is rendered useless)
If you post this in the Car Section we have members who are really expert on what to do.

as previously said, leave radio powered on until it allows you to enter code

if you don't have code then generally the only place you will get it from is the dealership or paid service websites
code can be got from reading EEPROM but this is a bit of a specialists job