1993 GMC Sierra Truck Won't Start

DJ09041966

MEMBER
1993 GMC SIERRA
V8
4WD
MANUAL
137,000 MILES

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?

4 Replies

BLACKOP555

MECHANIC
10,371 POSTS

Can you check to see if the coil is putting off voltage? Please post back.

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Sunday, December 9th, 2007 AT 3:20 PM

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.

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Monday, December 10th, 2007 AT 7:52 PM

BLACKOP555

MECHANIC
10,371 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.

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Tuesday, December 11th, 2007 AT 4:44 PM

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.

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Tuesday, December 11th, 2007 AT 8:27 PM