One of the most common problems for this kind of truck is the fuel pump, you can help confirm the issue if you use starter fluid in the intake. If the engine starts here is how to change the fuel pump out and I also included this guide which can help you as well.
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.