Hey, BFrazier, welcome. I'm new here myself, but not to the old Chevy truck world. In fact, I did just what you're talking about doing. Mine is an '88 SWB 4WD 5.7 L standard cab that sat still for 10 years until I bought it. I shot about 1/2 a can of penetrating oil into the cylinders and let it sit for a week before I tried to turn it by hand. It turned, so I attempted to start it. No luck. I dropped the tank. The inside looked like the Titanic looks now, so I threw it in the trash and bought a new loaded tank for about $300. Still no luck. I then took the throttle body apart and cleaned it. The old fuel had ruined the pressure regulator, so I replaced the regulator ($ not much) and cleaned the throttle body. I also ended up replacing both injectors ($40 each). The fuel system is brand new except for the gas cap and fuel gauge. I cranked it, and it ran.
You can do this. As the others have said, the fuel pump is the first place to start. You said you have a '93 model? You have an ALDL (pre-OBDII) terminal. On ALDL, Terminal G (lower left) activates the fuel pump when 12V is applied to it. CAREFULLY touch a wire from 12V to this port (and nothing else), and you should hear the fuel pump activate. If it doesn't, the pump is bad. Replace it, and the fuel filter while you're under the truck.
The following sequence assumes that you have spark from the distributor to the plugs.
Once you have either verified that you have a good pump, or replaced the bad one, (and cleaned or replaced the tank) attempt to start the engine. If it doesn't start, check the fuel injectors by unplugging the connector at the top of each injector, and touching the terminals with a 9V battery. If you hear a click, it's good. If you don't hear a click, replace the injector(s). Once the injectors are verified or replaced, give it another try. If it doesn't start, the only component left in the fuel system is the fuel pressure regulator. It is located in the back of the throttle body. A replacement kit is available. Clean the crud out of the regulator housing area of the throttle body, replace the sacrificial components, and fire it up.
Good luck and let us know how it goes !