chevy s1500 4.3

Check the relay,s to the pump,and the main fuse,s under hood in fuse box.

Ok found a relay to Fpump bad by using the horn to test them all. Fuel pump back in action, but no spark. Replaced worn plug wires yesterday no change. I am getting 12v at Ignition control module and crankshaft sensor. All fuses under hood and dash pass continuity.

Sound,s like the ICM,you checked it for volt,s but that does not mean it is firing to plug,etheir this or your igintion switch.

I did take it to autozone and they ran the test 4 or 5 times they said it was good should I try it again or goto advance auto and let them try? Where is the ignition switch you mean where the key is?

Yes,where key is,have that ICM checked again,then check the key cylinder.

Ok doing that today. How would I check the key cylinder? Have a chiltons that shows how to remove it. What do you mean by check it? Thanks Jason

ok, they tested ign control module 4 times to heat it up still passed

update. Check resistances on coil 5.8k pin1 to plug boot. pins 1 and 3 1.1 ohms test light on white wire when cranking flashes light. I now have spark and when i press on plug motor dies. So I'll get a new connector and see how that goes. Thanks a bunch