does a 94 Chevy silverado have a vacuum line?

There are many vacuum lines on any vehicle. Vacuum is used to control all kinds of components on a motor. Small vacuum leaks will affect the idle (loping and stalling when stopped) but should not cause the vehicle to be excessively sluggish when you stomp the gas, only somewhat sluggish, almost not noticeable when you stomp it.

If you have a vacuum leak you will be searching for a hissing sound under the hood of the car. Vacuum lines are generally black lines coming off of the throttle body. If you wiggle a line with a vacuum leak you will hear the hissing get louder and quieter as you wiggle it.

In my experience sluggish performance while the pedal is to the floor is generally caused by insufficient fuel reaching the motor (fuel filter, fuel pump), weak coils or bad spark plugs, bad oxygen sensors, compression loss, or timing.

EDIT: Assuming it has 1 coil and has a distributor cap, there should be a bolt on the intake manifold holding the distributor cap from rotating. Loosen it and rotate the distributor and see if performance improves. It only takes minor adjustments for major improvements. This is how you adjust your ignition timing. Take care not to shock yourself.

Is your check engine light on, have you checked for sufficient fuel pressure, have you had a compression test?

There is MANY vacuum lines on your truck's engine

Not wanting to take gas... Sounds more like a bad fuel pump or clogged fuel filter

Actting sluggish could be many things from needing a tune up to needing a rebuild lol.

It has hundreds of them. They are located everywhere. Yes.