Activating CD Changer on 03 S10

OK, so I bought a aux port device to hook up my iPod to my stock radio in my 03 S10. It has the controls on it for a CD/AUX and the 12 pin port on the back, yet the device does not work. After alot of looking around, I found out that some CLass II radios did not have the CD changer "activated". The dealer wants a minimum $95.00 to do this cause you need a GM tech tool to re-program the radio, and even that is apparently no guarantee....

Anyone else run into this before or have any ideas?

Thanks.

yea... dunno much about the factory stereo, but if they say it needs the tech scanner, it's def a dealership job. call around to some local shops and see if they have the tech scanner. might save ya a couple $