No oil pressure

2005 GMC YUKON
260,000 MILES • 6.0L • 4 CYL • 4WD
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FREESTYLEFRANK
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Engine shuts off as soon as I start it. I know this is a safety feature for the engine. I have changed the oil pump, cleaned the oil pan and pump screen. I am at a loss.
Please note: This vehicle is an eight cylinder not a four cylinder.
Oct 5, 2019 at 8:28 AM
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ASEMASTER6371
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Good evening,

This sounds light a security issue, not an oil pressure issue.

Does the theft light go off after the key is turned on in about 10 seconds?

https://www.2carpros.com/articles/how-to-reset-a-security-system

Roy
Oct 5, 2019 at 3:54 PM
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FREESTYLEFRANK
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Yeah, the theft light is not illuminated.
Oct 5, 2019 at 5:11 PM
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ASEMASTER6371
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Okay, then the next step is to do a manual oil pressure test to see if it is either a real oil pressure issue or the sender unit is sending a false signal.

Remove the sender unit and insert a manual gauge and crank up the motor and see if it has oil pressure.

Roy
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Oct 6, 2019 at 5:00 AM
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FREESTYLEFRANK
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Thanks, I'll give that shot.
Oct 6, 2019 at 5:50 AM
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ASEMASTER6371
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You are welcome.

Keep me updated.

Roy
Oct 6, 2019 at 5:57 AM