Maybe someone with the problem could post a pic of their console. That would really help narrow down the troubleshooting. There are a couple different configurations. Below is a pic from my '09 without climate control vs my '11 with climate control (or you might have the Nav version).
Sorry in advance for the crappy pics. I didn't take them explicitly for this thread but happened to have ones that almost showed the climate controls.
But my best advice is to take it to the dealer if you think something is broken. Worst case ... you take a rental truck on your trip and save the mileage on your truck!