Hi guys! I bought a new Buick 2014 and I am not sure if it is my USB cord or a speaker problem but the music cuts out a lot especially with USB. I get this every now and then using XM but also some times I hear a crack. Does that make sense to anyone? What can this mean? Is it a problem or just maybe the connection my iphone? I also run the Waze app a lot since I commute. I am not sure if this could be it too. I wanted to see if anyone else has this problem. Thanks!