What I'm seeing with my stereo is when I turn on my vehicle all the FM channels will be static / snow. Switching to XM, those channels are fine. It doesn't change if I simply turn off the radio, I have to turn off my vehicle and open the driver's door, then restart. When I restart its fine. I've taken my 2010 Terrain into the dealer to see if they could find what causes this. They said updated the firmware and called GM. Just putting this out there to see if anyone else is experiencing this and more importantly if they found a solution.