I have a 06 Dodge 2500 Q/C with factory Sirrus Radio. I am swapping the factory 6 disc cd radio out for the factory "REC" 6 Disc Sattelite/GPS will the stocksatteliteantenna on the roof of my truck work for the GPS or do you have to buy another kind of antenna? I have ordered the GPS and Bezel but cant seem to find anything out about the Antenna. If anyone one can help I would greatly appreciate it. Thanks. Eric