Gm unlock codes for factory rds radio. it has cd

There is a code to get from the radio, then a Technicians will call GM to get the actual unlock code. Only takes a few minutes.
See this link to do it yourself. They have a 1 hour turn around...
GM Radio Unlock Codes

2003 CTS replaced the radio with a salvage yard replacement , install and when the power cae on the radio has a locked message. Are there codes that i can give the radio , or will it need to go to the dealer..

Type your question in google,there are many sites with the codes for your specific radio.They are different for each serial/model #/vin #.