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Old 04-10-2011, 12:22 PM
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i have a 93 c/k1500 with issues

this is why i am stumped its got to be electrical my truck runs it shuts off some times with in twenty min at a idle or you can take it for a drive and it not shut off till you stap at a light it does this random and every time you can start it right back up the oil pressure drops slowly at a light but no eng noises and it dont madder if its in two of fwd and does it when it wants to please help

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Old 04-11-2011, 08:08 PM
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Wow 20 views and no replies! well I had a 89 full-size and it did that and it was the my computer. Is your engine light on?
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Old 04-12-2011, 03:50 PM
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An oil pressure switch closes a circuit when the pressure increases (engine running) thus powering the fuel pump.
If this switch is not working correctly or the engine pressure is very low due to wear or a bad oil pump the fuel pump will shut off, stopping the engine.
This is a safety feature so that the fuel pump will not run unless the engine is running or there is loss of oil pressure.
The oil pressure switch can be temporarily by-passed to test this but it should be repaired correctly.

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Old 04-12-2011, 04:08 PM
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It could be a lot of things ground wires and so on! This site is good for help www.fullsizechevy.com Also if your going to keep the truck I would invest in the shop manual off of ebay I did save me a lot of time to help you trouble and fix your truck. Its just a guess game with out them!

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