Your ignition system consists of a 12v control section where the engine computer takes sensor inputs and tells the ignition module when to initiate a spark. The ignition module the tells the coil with a 12v signal to initiate the spark. The coil then outputs a very high voltage level that is capable of jumping the distributor gap and in turn the spark plug gap. You need to determine if the problem is in the high voltage section from the coil to the plugs or the low voltage section from the sensors to the coil.

the correct way to test high voltage is to form a 1” gap to ground and crank the truck over to check for 1” of strong blue spark. You start with a plug wire pulled from a plug. If no spark then pull the high voltage lead going into the distr from the coil and repeat the test. If no spark then your problem is a faulty coil or in the low voltage control section between the sensors and the coil low voltage/primary circuit. Report back on the high voltage/secondary tests and we can go from there.

Proper diagnosis is preferred over blindly swapping parts as I have suggested here but if you prefer to swap parts, then replace these one at a time:

ICM
crank position sensor

George