Crank Shaft Sensor for 2.5E 1991 Chevy S10

If you take coil wire loose from distributor cap and hold close to engine ground, engine cranking, does a spark jump? If it does, make sure rotor turns when you crank it. The pink wire at the coil goes hot with key on, that is primary voltage, use a test light, is it hot? That voltage comes from ecm fuse1--15 amp, check voltage with key on.
If sensor issue, my first thought would be the crank sensor. Just my opinion.

Crank sensor, ignition module, coil, pick up coil, wiring, rotor, points,distributor, or distributor cap. This pretty much covers from the 70's to today.

Kelly, could be a few issues, security lock out, crank sensor, fuel pump fuse/relay, faulty new pump,faulty ignition switch, etc. Attached links may help you diagnose the crank no start issue you are having.
Check the attached links,video,instruction and guides, Good luck
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The info I looked at was for 2.5L engine, non-turbo.
If you have distributor, you don't have one. You may have a sensor inside distributor. Because the distributor usually works off the cam shaft, they don't call it a crank sensor.
Now, if you have a coil pack, you do have a crank sensor, some I've seen are on the tranny bell-housing. Or at the cranks shaft pulley in the front.
I did look at online partsbook for the engine I listed, no crank sensor listed.

I don't think they have a crank shaft position se 2.8 m Nleader

you said you repl dist cap that means you don't have a crank sensor you have electronic ing module. remove your elec ing module have it tested most auto parts stores could test your module, or check your coil at the neg terminal. should have power. if not you lost your primary volt from your batt.your secondary power is coming from your electronic ing module from the module to the pos terminal on the coil, when the eng cranks,from the coil to the dist cap , from the dist cap center to the rotor then out to the plugs,this all happen pervided the timing belt or timing chain is ok. the cumbustion chainber needs 3 things , thats fuel, air, and spark.

I'm assuming that you verified that the distributor is rotating. Verify that you have good secondary wires. verify that your pimary circuit is good.

check to see if the coil spins when you crank the motor the other thing is the crankshaft sensor is bad

I had the same problem last year mine turned out to be a crank sensor I don't know if that is your problem for sure mine wouldn't send any spark from the coil to the spark plug replaced crank sensor inside distributor and fired right up the dealership called it a cam sensor my book called it a crank sensor either way its in the distributor

I had the same problem with mine. I have a 91 trans am, and My problem was a temp sensor on the motor. I put a new one on, and it fired right up. Hopefully that helps you out a bit.