I just bought an 06 2500 slt with oem sat installed. I however have XM no sirius. I called both and each one said they can only send a sirius signal to the box. I dont want to change subscription( I know they are merging) Can i take the antenna nicely mounted on the truck and plug it into a Xm box ? like XM direct per say? I have to have sat radio but I dont want to split up subscriptions. thanx for your help