1993 GMC Sierra Truck Won't Start

1993 GMC SIERRA
137,000 MILES • V8 • 4WD • MANUAL
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DJ09041966
  • MEMBER
  • 3 POSTS
Last week, radiator plug blew out and had to be replaced. Replaced radiator plug and thermostat and truck was back on road. About a week later, I went to move truck and it wouldn't start. I checked and replaced distributor rotor button, pick up coil, checked electrical module, and regular coil. It turns over but no spark. This has stump me and three other car parts stores. Can you help?
Dec 9, 2007 at 6:21 AM
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BLACKOP555
  • ✓Experienced Mechanic
  • 10,386 POSTS
can you check to see if the coil is putting off voltage? please post back.
Dec 9, 2007 at 7:20 AM
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DJ09041966
  • MEMBER
  • 3 POSTS
Coil is getting juice. We tried a new electrical module. Still no power. We tried to jump the Sierra from another truck, and still won't fire.
Dec 10, 2007 at 11:52 AM
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BLACKOP555
  • ✓Experienced Mechanic
  • 10,386 POSTS
is the coil putting off power though? also line up #1 cylinder at TDC then check to see if hte rotor is pointing at #1. also you may need a new crank sensor if the coil is putting off voltage.
Dec 11, 2007 at 8:44 AM
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DJ09041966
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  • 3 POSTS
I'm not sure what you said but here is an update. The four wires that go from the firewall into the ignition/electrical module doesn't have power. Any suggestions.
Dec 11, 2007 at 12:27 PM
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