Truck tries to turn over, but will not?

Hello,

Just so we cover the basic, have you tried to jump start the vehicle?
Even though the lights are coming on, the battery might not have enough power to start the engine.

https://www.2carpros.com/articles/how-to-jump-start-car-battery-using-jumper-cables

If you try to jump start it and it still does the same thing, just barely turns over you could have a bad starter.

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

Now if the engine cranks over strong but does not start, it can be due to either not getting spark or fuel.
Check to see if you are getting spark.

Here is a helpful guide:

https://www.2carpros.com/articles/how-to-test-an-ignition-system

When you turn on the key can you hear the fuel pump come on? An inoperative or weak fuel pump can also keep the engine from running.

I have attached diagrams for your reference.

Please let me know of any questions.
Thank you.