Have the standard SLT-1 CD changer radio (no XM) Noticed FM reception is frequently terrible. When the reception is good, the radio sounds great. It's not the speakers, tried a CD and plugged in the Ipod and they sound great. Also tried the Onstar a few times. Not so clear. Noticed on one occasion I could barely understand the person, it was so distorted. Tried the turn by turn nav twice. The volume was so low(even with the volume all the way up) that I could barely hear. I also tried the phone yesterday for the first time. Onstar says the signal is supposed to be stronger than a cell phone. Not. The person I was talking to said they could barely understand me, that the call was "cutting out". Radio reception and clarity were never an issue in any of my previous SUVS (they were not GM). This is definitely added to my dealer list, but I would appreciate any feedback from local owners.