Xm Unit In 2003 Sierra

[Leeanator]

Hey All,

 

I have XM radio in my work van and I just through a RoadyXT into there. I decided I want to get a second unit for my 2003 Sierra. It has a stock CD Player in it. Is there a kit available where I can get the XM box that plugs into the existing head unit. I don't really want wires running everywhere; and I want to tie it into the existing system. On the XM site they have a kit for Satelite Ready head units; SEE HERE ; and then I found this SEE HERE

 

Will this allow me to use my existing head unit? (second one) I am guessing I would hit the AUX button on my head unit.

 

Thanks for your help

 

Lee