[RIP]

If you do a thorough search with the search function you'll see this problem is more common than you might think. Try these:

> Remove the IOD fuse in the power distribution center (next to battery) for about a minute then reinstall. This will reset the Body Control Module or BCM. It's a little bitch of a box that controls all the electronic functions except engine monitoring and airbags. It can create many headaches.
> Remove and clean both battery connections and the ground point for the negative lead. The electronics are sensative to corrosion.
> Inspect the instrument cluster connector and circuit board for bad solder joints.
> Believe it or not just wack the top of the dash. It has fixed some at least temporarily.