My wife & I hopped in my '99 DII headed for vaction last weekend. We made one last stop to get my wife's coffe at MacDs. As we pulled up to the window to pay the truck just died rite there at the drive-thru. Turns over fine, just no hint of running. Had it towed home & continued on to vacation, haven't looked at it since. I'm guessing fuel pump? Any thoughts or suggestions before I begin flayling away at my freshly filled gas tank?