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Old 12-13-2014, 05:34 PM
Simmose Simmose is offline
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1998 GMC Sierra 2500 5.7 Vortec won't start when it's raining.

My truck has a tendency to not want to start when it is raining or there is high humidity. It cranks but will not fire. I have tried replacing the coil, plug wires, distributor cap and still nothing. I have no spark.
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Old 12-15-2014, 04:14 PM
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strmn94 strmn94 is offline
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Re: 1998 GMC Sierra 2500 5.7 Vortec won't start when it's raining.

have you checked the crank sensor? on that year, that engine uses a crank sensor, and a cam sensor. the cam sensor is in the distributor. the crank sensor i believe is at the front and bottom of the engine.
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