Ok so how do I connect an ipod or mp3 to my 05 H2? I have tried the Fm transmitters that you tune to a unused Fm frequencie and the performance of these units suck! I do not want to switch out my head unit since I have nav, onstar,and rear seat entertainment all factory GM stuff.My concern about some of the interfaces available is some can knock out other parts of the audio video system,or induce electronic interference.I am getting tired of having to remove my nav disc. everytime I listen to a Cd. Has anyone come up with a solution that works without replacing the factory head unit.