I picked up my new 2011 Sierra last Sat. On very next day, DIC button with road pic on it stopped working. Does not respond. It was stuck on instant fuel economy screen. After brief stop at dealership on Mon. we were able switched on odometer reading with manual button which is on the right of speedometer. Since than odometer reading is randomly switching between odometer and trip odometer by itself. After today visit dealership, I got appointment for warranty repair on Sat. It's weird. Does anyone heard about problem like that????