Truck shuts off randomly while driving down the road?

This sounds like a fuel delivery problem, or the throttle body needs to be serviced and it is causing the truck to go into limp mode. Let's start by scanning the truck for codes to see what comes up which should point us in the right direction.

This guide should help:

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Here is a guide to help you understand the Limp Mode problem"

https://www.2carpros.com/articles/reduced-power-limp-mode

This guide can walk you through the throttle bore service and I have included instructions for your truck in the guides below:

https://www.2carpros.com/articles/throttle-actuator-service

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.

When you ran the codes did you do a CAN scan? This should tell us more. You can get a CAN scanner (Controller Area Network) which will work on most cars from Amazon.

Here is a video to show you how:

https://youtu.be/u-4syLc-ifQ

and

https://www.2carpros.com/articles/can-scan-controller-area-network-easy

Here is one for about $99.00 if you need it:

https://amzn.to/3ZixY4v

It does sound like the PCM or BCM is resetting which will cause the truck to stall out. Also, I have seen an intermittent shorting MAF sensor cause this as well. The low fuel pressure is a clue as well, the fuel pump may be getting weak. I found the fuel filter inside the fuel conditioning module I would change first. 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. Here is how to change the fuel pressure as well.