Lost power while driving, then after parking the truck it will not start?

It sounds like the fuel pump has gone out, can you hear the pump running inside the tank if you turn the key on and don't crank the engine over? If not, chances are the fuel pump went out. Please go over this guide as well:

https://www.2carpros.com/articles/car-not-running-advanced

Here is how to change the fuel pump out in case you need it, I would swap out the fuel pump relay as well. It is located in the PCD under the hood. Check out the images (below). Let us know what happens and please upload pictures or videos of the problem so we can see what's going on.