My CTS Vsport premium is a year old with a little less than 12k miles, and has been trouble free. I mainly drive it to work and back, and it has never been wrecked or abused. This morning when I started it up in the garage to leave for work, I got multiple error messages including: "Service differential, " "cannot tension seatbelt," traction conrol off," "stabiltrack off," and others, but no reduced power warning. While driving to dealer, the transmission would not shift past 3rd gear. Needless to say, I am concerned and wonder if any other owners have experienced such a problem? I will keep this forum posted.