OK 1997 gmc sierra 5.7liter 4x4 replaced coil and

Check to see if you are getting spark from the coil to the distributor. I suppose the engine is a 5.7 liter?If not getting spark to the cap, then check for power and ground pulse at the coil.If there is spark at the cap, replace the ignition rotor. If there is no power or ground pulse at the coil,check to see if the ignition rotor is spinning when the starter is engaged. If the distributor is not spinning while cranking the engine there are several more things you'll need to check,i.e.,distributor gear and pin as well as oil pump if the pin or gear are damaged.

Something wrong in the fuse box if you only have .4 volts at the fuse. Maybe a loose terminal in there.

Recheck the cap. I am sure you dropped the carbon conductor that conects the HT from coil to rotor. I need feedback on this one.

I would check the crankshaft sensor, mounted down by the crankshaft pulley.

Do you have spark??? if so, check fuel pressure, these trucks must have 60 psi to run, 50 psi will not work,.

Your egr.valve may not be functioning good chanse its got carbon build up, or there is no vacume to it, remove it and clean it with carb cleaner, both the valve and the intake.

Have you checked the fuses? I think there are 2 ECM fuses if either one blows there will be no spark.

It could be the CPS, but as you now know throwing parts at a repair is costly and sometimes it does not fix anything. A code scanner should be able to tell you if the sensor is bad. If the CPS goes bad you will have no spark.

is the rotor shaft gear new? if not check it out that will cause your problem

1996 GMC 1500 Pickup.
Replaced Coil, Dist cap/Rotor, Ign Mod & pick-up.
All showed to be bad with OHM meter.

20A ECM-B fuse keeps blowing out and I'm afraid to burn these new parts up....

ANY IDEAS OUT THERE???