Soosick, let us know if and what your dealership finds to be the problem with your truck.
Another update:
The problem persists. Yesterday the truck went crazy again - "servce stabilitrak" along with flickering/shuttering gauges and AC - power steering stopped briefly and this time the truck actually shut off. It was when I was pulling out of a driveway.
This morning, I noticed on my way to work (dark outside) that whenever I pressed on the brake, my headlights would flicker. This has happened previously. These two problems are related, I'm sure.
I will be calling the dealership later today.