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2000 GMC Sierra 1500 V6 wont start after rain. It just

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2000 GMC Sierra 1500...

2000 GMC Sierra 1500 V6 wont start after rain. It just cranks and appears to catch but dies out. Previously it would start and run rough until the engine warmed but now it just cranks. I get code P1951. Have replaced plugs, spark wires, ignition coil, distributor cap. Plus fuel injectors and fuel pressure regulator for a previous problem.

Mechanic's Assistant: How many miles are on the vehicle? And when was it last serviced?

125000 last item changed was the o2 sensor in the lower exhaust about mid July.

Mechanic's Assistant: Are you fixing your Sierra 1500 yourself? What have you tried so far?

After rain let it sit for a day in the sun and it runs. sometimes rough at first then fine. Last trip two weeks ago of 145 miles one way and back.

Mechanic's Assistant: Anything else you want the mechanic to know before I connect you?

THat is about it

Submitted: 9 months ago.Category: GMC
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Answered in 2 hours by:
9/23/2017
GMC Mechanic: Merc320, Technician replied 9 months ago
Merc320
Merc320, Technician
Category: GMC
Satisfied Customers: 358
Experience: City & guilds pt 1 & 2
Verified

Hi my name is ***** ***** am here to assist you.

i would say you need to spray all youre electrics with silicone to stop it arking in wet weather.

The electrics are tracking when wet.

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GMC Mechanic: Merc320, Technician replied 9 months ago

Please keep me informed.

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