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I have a 2005 gmc yukon Denali 6.0 litter and when I start the motor the oil pressure is around 40, but when it's idling, the oil pressure drops to zero. I have 200,000 miles on it now. What could be the issue?

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TRY CHECKING OIL PRESURE WITH A MANUAL GAUGE IF IT CHECKS OUT GOOD THEN CHANGE OIL PRESURE SWITCH

Posted on Dec 10, 2014

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Posted on Jan 02, 2017

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SOURCE: 2005 gmc yukon xl denali service ride control

it has to do with your air ride suspension best bet is take it to the dealer there is probably a problem with a level sensor. hope this helps you

Posted on Mar 16, 2009

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SOURCE: 2006 Yukon Denali, oil pressure gauge malfunction

Most likely the oil pressure sensor is bad. Its located in the very rear of engine on top of bell housing area.

Posted on Oct 30, 2009

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SOURCE: low oil pressure 93 GMC P/U w/350 motor w/205,000 miles gauge

While engine is running, open the cover where you add oil to engine and see if you see a good flow of oil, if good flow, could be as easy as replacing oil sending sensor. got to realize that if poor maintenance history your engine may not be building enough pressure at iddle to move your hydraulic operated valves, only when you rev it up it will pump enough to run smooth. if running engine too long, you may cause more damage to other engine components such as crankshaft and cam shaft bearings. if you can spare a few bucks, have a good mechanic check your oil pressure with a mechanical gauge. another cheap option is to replace oil pump. last resort if you love your truck as much as we do,replace engine or rebuild it. At 205,000 this is a normal symptom, other than timing chain problems, most engines don't make it that far. hope this helps!

Posted on Mar 01, 2010

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SOURCE: Speedometer not working properly

There was not a recall, but there was a class action settlement where GM agreed to extend the warranty on certain vehicles for this problem. Check www.gmspeedometerrecall.com to see if you qualify.

Posted on Mar 16, 2010

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SOURCE: Need to reset oil life

it depends........ if you have controls on the steering wheel or not. If you do, then go through the menu until you see OIL LIFE then hold in the reset button (looks like a backwards "L" with an arrow on it). Hold the reset button in until it reads OIL LIFE RESET or OIL LIFE 100%. If you don't have controls on the steering wheel, turn key on (engine off) and depress the gas pedal to the floor 3 times, now turn key off. crank engine up and see that it has reset, if not try it again.

Posted on Dec 21, 2010

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2006 Yukon Denali, oil pressure gauge malfunction


Most likely the oil pressure sensor is bad. Its located in the very rear of engine on top of bell housing area.

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