Yesterday driving home from the office I get a chime and a message stating "transmission failure"= drive at moderate speeds until able to take to dealer. Within 10 minutes other messages came on: all wheel drive failure, dsc malfunction, brake light came on. I-drive then froze up. Drove to dealer (about a mile away)- they saw all the messages. Took a look- scanned it. Said there was nothing wrong- they couldn't find any faults and that it must have just been a software glitch. Seems pretty strange to me. Any similar experiences- do I just wait and watch? Truck is 2008 4.8, not quite a year and a half old- has about 21000 miles. Am a little nervous about taking it out on the road or anywhere too far from dealer.