Could be fuel pump, or fuel pump relay, could be ignition module, could be a lot of things. This model has throttle body fuel injection so take off the air cleaner and crank the engine to see if any fuel comes out from the two injectors. You can see them hung over the throttle bores. No fuel spray “cone”??Swap out the fuel pump relay from another in the fuse box. There should be another of the same type in there for another feature. If it starts, there’s your problem. If not, it is most likely the pump.
Ok, fuel but no start says “ignition”. Pull a spark plug wire and see if it has spark when cranking. No spark? Pull the distributor cap and cehck the coil resistance. Is it open circuit? Replace the coil. If the coil is OK, change the ignition module inside the distributor, and the cap and rotor, too while you are there.
Could also be the MAP sensor or the TPS sensor but I don’t think that would cause a no-start. It would be helpful if you pull the engine codes from this thing and post them here. Google “read codes for OBD 1 on a GM truck” to find out how.
That should lead you to the most likely problem but not all of them.