Not to be argumentative, but Kaine could have driven the car while Terri took the truck.
I wonder, too, if any reporter followed the truck. But, wherever they took the truck, especially if it was to a dealership, I would think, it could have been arranged by LE in conjunction with the shop or dealership.
Also, forensic work could have been done on the truck (and the car) at the Horman property, and the truck was brought to the new location for some other reason. (This because of people pointing out that LE probably wouldn't tow it uncovered).
Just trying to think of all possibilities.
my opinion.