I tried this question before and got no love, so I'm going to give it another shot. <BR> <BR>My truck came with XM, so it already has an XM antenna wired to the roof. I'd like to use a portable Sirius unit in the truck, but I don't want to have to wire another antenna through the dash and roof. Can I use an XM antenna for a Sirius system?

<a href="http://www.tss-radio.com/sirius-dual-input-antenna-adapter-p-3910.html?osCsid=f9ff44cf14944e9e49d7aa7bf60664be" target="_blank">http://www.tss-radio.com/sirius-dual-input-antenna-adapter-p-3910.html?osCsid=f9ff44cf14944e9e49d7aa7bf60664be</a>