1996 Chevy Silverado

Check the -ECM Fuse-1. It is located in the fuse block under the hood - on the left side of the engine compartment. I believe it is a 20 amp fuse - this fuse sends power to the injecters (which have power at all times). Being that you have the proper fuel pressure and spark indicates that the injecters are not allowing fuel into the combustion chamber.

How did you test he spark? What color is the spark? Observe how strong the spark is.
Over filling the gas tank will not cause the engine to not start. There is no shut off devise.

Remove the plugs - tell me what they look like. And if they all look the same.

The wet plugs indicates that there is no spark. Also, the spark should be blue in color - an orange spark indicates a weak spark. Test the ignition coil and the ignition module. Also, autozone or a place like that can test both for free. Be very carefull when you unplug the coil and module. The pins inside of these connectors are very easily damaged. Pull the connector straight out - do not wiggle them.

Well that's around 40 bucks down the drain because you did not test the coil. There is no way to determine the problem if you do not test items first. Test to see if there is 12 volts to the coil with the key turned on. Unplug the coil and test the pink wire to a good ground - There should be 12 volts there.
The next step is to test (or have it tested) the ignition module. These are around 75 bucks. If it is ok, test ignition control modules' ground. It is the black wire that connects to the module. Make sure there is good continuity to ground. If ok, then test to see if the module is working properly. You need a 12 volt test light. Do you have a 12 volt test light?
You mentioned that you removed the crank sensor. Did you reinstall it? There will be no spark if the crank sensor is not installed. The computer reads the sensors' input to determine when to send a signal to the ignition control -- which in turn fires the coil.

Test the resistance in the wire. It should have about 30000 ohms of resistance ( a rule of thumb on spark plug wire resistance is 10000 per foot). Try switching number 2 plug wire with number 3 -- they are close to the same length. See if the problem switches to cylinder 2. If it does then it is the wire. Remember to use A/C Delco ignition parts ONLY on these engines. Aftermarket will only lead to more headaches.
Do you have a digital multi-meter to test for voltage and resistance? If not then I suggest purchasing one or borrowing one. Actron automotive multimeters are the best bargan out there, they are sold at Sears and most automotive parts stores, and they are well worth the 60 bucks or so.
Your problem is electrcal, the fact that the engine fires when you disconnect cylinder 3 plug wire is strange. It may be that wire causing the problem - but it is not likely because you found that all 4 cylinders on one side were wet with fuel.
What about the crank sensor? Did you re-install the sensor or did you replace it? If you replaced it, did you have the computer reprogramed to see the new sensor?
The compression seems good, but check all the cylinders. Eventhough it is about 120PSI or so, all of the cylinders must be within 10% or 12% of eachother. If not then the knock sensor may send a trouble signal to the computer.
Did you check the ground to the ignition control module.(It is the black wire on the plug). It should have zero resistance to ground.

Your multimeter should have a setting for resistance. Resistance is measured in ohms. Find the setting on the meter where either a beep is heard when you connect the two leads together and/or the meter goes to 00000 when the leads are touched together. This is the resistance setting.I suggest getting an instruction manual for your multimeter and reading how to use it. You can probably get one on-line somewhere--what type of meter is it?
You test the resistance of the spark plug wire by setting your meter to the highest resistance level and connecting the meter leads to each end of the wire (the wire is disconnected).
To test the resistance to ground on the module - unplug the connector, set the multi meter to the resistance setting, and test the same wire (the black one) to ground. See if there is any resistance there. If there is then clean up the ground that connects to the thermostat housing.

Is the crank sensor new or did you change it?
The p0101 indicates a failing or bad Mass Air Flow (MAF) meter. The p0300 may be a result of many things that have to be tested. Before you go any further, learn how to use the multimeter or take the parts I keep mentioning to Autozone or a place like that and they will test them for free.