Delphi has a FM Modulator that has an antenna wire interface so it makes a FM frequency (there are 3 choices) so just set the truck radio to that channel and it works. It provides power from regular power Wire scorce to the radio so no 12 volt wire from the Acc. plug.
I have the delphi XM radio and the vehicle cradle. I also have the FM modulator in my truck and the sound it just little muted but rectified by volume... .