1993 Chevrolet Silverado carburator

What kind of problem are you trying to solve? You don't have a carburetor. You have a throttle body which is nothing more than a throttle blade and an idle speed motor.

The only thing you're going to solve by cleaning the throttle body is a hesitation on acceleration, or a low idle speed. Even the low idle speed is pretty much a thing of the past with the better additives in today's fuels. That was caused by carbon build-up in the air passage around the throttle blade. GM never had a lot of trouble with that.

If you're not getting fuel, that has to do with the fuel supply system and the injectors. No fuel goes through the throttle body. Normally I would say to not get hung up on the first thing you find missing, meaning fuel, and check for spark too, but since it runs on starting fluid, we can assume spark is okay. Most no-start problems are caused by missing spark AND injector pulses.

Removing the fuel line isn't conclusive either because you need to know exactly what the pressure is. A lot of GM vehicles won't start if the pressure is just a few pounds lower than specs. Typically they call for around 45 to 50 psi. In the classes I attend, they always talk about low fuel pressure on GM trucks, and the cause is a weak fuel pump, but I don't know how common that really is.

If you have a complete fuel pressure gauge kit, there should be some tee fittings in there. Look for the rubber hose that connects the steel line on the body to the fuel rail. That's where the tee is inserted.

During that time period GM used an unusual gauge design that had two electromagnets in it. The weaker one pulled the needle to way over "full" and the stronger one pulled it back down based on the resistance of the sending unit in the tank. A broken ground wire or rusty tank strap can cause a loss of ground for the gauge, and that often results in a dead pump too.

I'll be back in the next day or two to see how you're doing.

Dandy. Happy to hear it's solved.