Let's think this through. Here is what one needs to successfully do it:
1) Know where and when the truck will be
2) Hijack it
3) Drive said, very conspicuous vehicle, to some warehouse somewhere
At any point a whole multitude of things can go wrong
I often read about crimes that I wouldnt have a clue on how to pull off or even get the information I would need to make a plan. But someone does figure out how to do the crime and some get away with it.