I have a 1995 Chevy C/K1500, The engine cranks but no spark!

no engine told and is a pure engine question + EFI
nor what was moved with the newer engine to the older car.
to the blind and deaf.
lost the scan tool>?
check all fuses.
battery fully charged

Did you check primary voltage to ignition coil, pink wire, goes hot with key on. Use a test light to check for voltage. That circuit is fuse protected.
Does the rotor turn when you crank it?

1995 silverado has a distributor, remove the the distributor cap, make sure the distributor spins with the engine. also make sure the ignition rotor is not burned out or have a hole were it makes contact with the cap. also make sure the cap has a good carbon inside to make contact with the rotor, at this time get a screw driver, put it on the end of the wire from the coil to the cap, don't touch the metal part of the screwdriver, it will shock you if good, so put it at 5/16 from any metal on the engine, bracket, alternator , thermostat housing no matter, some one turns the engine over, check to see if the coil produces a spark, if the rotor turns, if ok it should have spark on all the wires, if it has no spark, remove the wire from the ignition coil and check if you have spak at the coil, if you have no spark, try getting a wire lead, connect it from the battery ground on one end, a screw driver on the coil to check for spark, and the other end of the wire with the key on, touch the - negative plug on the coil, that should produce a spark, if not spark yet, make sure you do have power at the coil with key on, if you do and it doesn't produce spark, replace coil. if it does spark but it is weak or yellow in color, replace coil. if coil is fine, replace distributor module,

Have you tried reversing the wire's on the coil ?

in the distributor is a ignition control module

change out your distributor cap and rotor button

I would look at the timing belt if it's never been replaced. Sounds like it is having issues under a load or the tensioner isn't working properly. Another possible issue could be a vacum component that isn't functioning properly until the engine and transmission get wormed up.

The crank angle sensor maybe bad. It sends a signal to the computer so the spark plugs fire up.

Are you getting spark to the plugs?? Take off a plug wire and put close to block 1/2" or so)and have someone crank engine-- is there spark?? if yes check ur fuel system--Fuel system could be plugged( filters) or worst fuel pump .

This is more common when there is a high level of moisture in the air especially with older components. Moisture can settle on the distributor and wires and act as a conductor. Since you are still having this problem with the new parts I would suggest using a moisture dissipating spray such as WD-40 or PB Blaster.