Hey Michael,
To be clear, the engine cranks, ( the starter is turning the engine over) correct?
Do you have a good strong spark when the engine is cranking? (if it is cranking)
Have you pulled a plug out and looked to see if they are wet?
Do they smell of gas?
Your plugs may be wet fouled.
get me the answers to the above questions first.
If you have fuel and spark and air the engine should at least try to start.
You may have some bad gas or alot of water in the fuel.
Was the truck sitting for awhile?
Good Luck