Truck will not start when it has been ran to full temp?

Hello,

One possibility is the coolant temperature sensor malfunctioning.
It could be sending signal to the ECU that the engine it "too hot". Which will make the engine not start.

https://www.2carpros.com/articles/how-a-coolant-temperature-sensor-works
https://www.2carpros.com/articles/symptoms-of-a-bad-coolant-temperature-sensor

Another possibility you could have an issue with the crank position sensor.
As many times the crank sensor will have issues when the temperature varies. A failing crank sensor may or may not trigger the check engine light.

https://www.2carpros.com/articles/how-a-crank-shaft-angle-sensor-works
https://www.2carpros.com/articles/symptoms-of-a-bad-crankshaft-sensor

I have attached the diagrams for your reference.

Please let me know of any questions.

Thank you.