They are seperate antennas.  All gps antennas should work they are the same for the most part.  Only a Sirius antenna will work on a Sirius   Read more...

That sounds like a bad cable,or fitting on phone or radio.  Try 1st another   Read more...

You need to check with your truck service department to see if your truck is listed as a CAN BUS truck.  This means the trucks computer controls the radio.  If it does then the JCV2015BT will replace your radio and work the steering wheel controls as welll as the sleeper controls.
This will replace the radio but not work with the screen.  The radio will plug direct into the factory   Read more...

Use the BT ISO   Read more...

If you trace the wire down the wires into the truck and don't find another harness then it would be either BT PAN CD or BT PAN CAS.  CD for a factory CD OEM and CAS for a OEM Cassatte   Read more...