In the audio config. screen on my 05 sts there is a symbol for a subwoofer which i can not access. I know this means that the sub is not installed, but where would it be installed? i have every other option on the car (heated steering wheel and seats, v8, navigation, heated seats, etc) i guess there is another sound package i did not get. I heard that it may possibly go in the center console. Has anyone added this aftermarket? Any help?

Ed, I am shooting from memory, so excuse me if I am mistaken... I believe you are referring to the icon for the "surround sound" speaker volume... When listening to AM/FM radio, this will always be greyed out. When you put in a CD or listen to XM, select CENTER POINT from the audio configuration screen, then the greyed out portion should become available for tinkering... Let me know if this helps

I see. I will check it out. Thanks.