Hi I'm new to the forum, I just picked up my new 1LT AWD last month and so far its been great, except for a problem with the USB connection to my iphone. I can live with it not charging my iphone which i know is some kind of compatibility problem that GM and apple need to work out, but I'm getting a static or crackling sound when listening to music. When I use the AUX port it sounds fine, but when I plug it into the USB I might get a minute or two with no problems but then it starts to sound pretty bad. And its strange because if i unplug the iphone and plug it back in it will sound fine again for a few minutes then the crackling sound will return and it gets progressively worse. I thought it was my iphone but then i tried two others (ipod nano and itouch) and it did the exact same thing. I also tried two different cables. So i pretty much know it has to be the vehicles USB port. When i brought it to the dealer they said it was a loose connection under the console and they fixed it, it worked while at the dealer but then on the way home it started again, so I doubt the dealer actually did anything. Is anybody else experiencing this problem?