My truck came with the satellite radio from the factory. It looses signal allot from trees and even rain storms. I have an XM in our Jeeps and it never looses the signal. Is this normal for Sirius, or do I have a problem the dealer should look into? When I say "allot" I mean 4 or 5 times an hour far a few seconds at a time. And some spots on the road always loose the signal in the same spot, but now with the XM.