It's worth noting that you can't siphon the latest gen of trucks, at least not in the traditional way. The capless design won't unlock unless you use a fuel nozzle or specially shaped funnel, then you've got a ball-and-cage valve behind it, to prevent evaporative emissions. (Which, coincidentally, also prevents a hose from going down the filler tube.)

With most vehicles nowadays it's easier to siphon from underneath. People that do it legally disconnect the filler tube, either on the body end or the tank end, and then siphon accordingly. People that do it illegally will just punch the tank. We had a lot of practice with the former during Hurricane Sandy.