Will not turn over?

It sounds like the starter has gone out or you have a bad connection at the battery, you can use a test light at the starter to see if the trigger wiring is getting a signal also try to start the truck in neutral to see if the gear range sensor (neutral safety switch) is having an issue.

Here are two guides to help us see what's going on and how to fix the problem:

https://www.2carpros.com/articles/everything-goes-dead-when-engine-is-cranked

and

https://www.2carpros.com/articles/starter-not-working-repair

Please go over these guides and report back.