Yea. Spoke with the stealership. No reset procedures for it. Truck is still under waranty, so I'm getting it replaced. (The sensor that is).
The tank was never empty, but soon as the warning came on, I topped it off. So I know the tank was never dry. The only reason I drained it after the fact, was to see if for some reason there was some type of vac or air bubble issue.
Oh well, I'll let them fix it.
Thanks for all the replies.