Originally Posted by aimran
If you care about sound quality, FM transmitter is not the way to go. For older cars, I would go with a cassette adapter. They have better sound quality and you don't have to worry about interference or signal. For newer car, I would do just plug it into the auxiliary input. Your Acadia should have a direct auxiliary input.
Thanks for the input(no pun intended
). I've got an Alpine CVA-1004 TV head unit with an expansion module which allows me to plug my Zune right into it. I've done this already. I just wanted to eliminate having two different plugs (charging and audio) sticking out of the Zune. I've already used the Aux 3.5mm input in the Acadia. For $15 I just figured I'd try this so I don't have extra wires hanging all over the place. I'm probably just going to convert the FM modulator portion to an 3.5mm output. This way I'll have just the "clean looking" Sync cable plugged in for charging and audio. I'll just have to also plug in the 3.5mm cable to the car stereo.