For some reason lately I can not get any sound to play out of the speakers when the IPOD is plugged in. I can easily see the song tracks, change the tracks, do all of the other functions but no volume plays. I have one of those navaigational systems in my Equinox so i can even see the indicator at the bottom showing how much time has played in the song but no sound- I have tried unplugging and replugging the IPOD, powered down the IPOD, tried everything I can think of. The sound on the IPOD works fine I even checked that.