I had a conversation with the dealer today, who in turn contacted GM re the problem. Apparently they admit there is a problem with the USB port located in the dash where it will not read the files from USB 2 & 3 memory sticks. They are working on the problem and will rectify when they get a solution. I guess till then it is wait and see! Someone in their design department dropped the ball on this, especially sinceIt is unlikely that you will find any USB 1.0 pen drives in the market today. Annoys me that when we lay out a substantial amount of money for a vehicle be it GM or another major manufacturer they let things like this pass final inspection!