Audio Systems: swapping delco radios, delco radios, cd changer

Question
I swapped a 99 Camaro Cd head unit into my 97 Camaro, that had a cassette head unit with a 12 disk cd changer. The cd head unit plays but doesn't control the changer and all the lights on the cd head unit don't light up, but the display works. I was told by my local dealership that the cd head unit has to be reprogramed is this true?  

Answer
no it can not be reprogram but it is true that is not going to work
some radios from a tras am and camaro did have all the buttons for a cd changer and also the plug but there is no software inside the radio to controll a cd changer and this can not be porgram in to the radio
sorry i can not help you more