For my 2014 RAM 3500 I just purchased the same antenna as is on the truck roof along with its connecting wire. Found a strong round magnet with a silicone cover and bolted it to the antenna. There is a connection inside the plastic cover on the passenger side roof column. Remove the two screws to take off the cover, disconnect the existing and reconnect the new antenna. Wire goes out the door through a gap to the bottom of the windshield and onto the hood. Works slick. Waterproof the now exposed connection on the hood. The Serius radio is very sensitive to any change in the antenna and length of the connecting wire. This way the connection is the same and the computer doen’t know. .