I have a new Ram 2500 truck and they are putting a shark fin type antennae on the roof. I assume it includes Sirius XM, navigation and the various apps that came with the deal. Unfortunately my camper apparently blocks this signal as those functions don't work "most of the time". The truck dealer was no help. A camper dealer was no help. An audio shop said they could add a new Sirius antennae but no ideas for the other functions. Anybody out there have an idea?