With the in dash 6 CD changer the jack is there on the back, but you don't have the external disk changer control functions on the radio (and the jack may not even be wired).
I was in the same boat, but I installed a Pioneer DEH-3800MP and Pioneer CD-IB100 iPod controller. I bought them both from Crutchfield for about $180. You could probably beat the price, but they give you a great adapter, a wiring harness to go with it, and the shipping was free.
Now with my JLAudio Stealthbox and Alpine 200W subwoofer amp the stereo sounds great! The headunit has 22W RMS/50W peak per channel which is enough for me. Working the iPod from the faceplate (or wireless remote)is a little slow and cumbersome, but it does work. The sound is crystal clear through the dock connector.
I am extremely happy, and I think it was a bargain!
__________________
 Black 03 PT Turbo & Black 94 Impala SS
|