Ok, so I'm taking the g/f home, and when I go to take off it feels like the truck is towing something. I look around, tow/haul isn't on and my emergency brake isn't engaged either so I decide to continue on to her house. I get there and walk inside for about 5 min and leave the truck running. Come back out, and my truck is making this terribly loud high-pitched whining noise. My first thoughts are that it is just the fuel pump about to make its last stand. Any input on to what else it could be would be appreciated.

Ron