why is it losing oil pressure

Asked by Apr 02, 2013 at 08:54 AM about the 2000 GMC Yukon XL

Question type: Maintenance & Repair

the oil gauge doesn't say on 40 it often drop down slowing when i stop the truck

4 Answers

93,655

The engine is old and oil pressure is dependent on engine speed and bearing clearances. Has the idle speed dropped?

3 out of 3 people think this is helpful.

The oil light begin flickerin'? You know there's a set of gears that turn to pump up the pressure, when these gears turn more slowly, pressure will drop. Is this a new problem, because droppin' down when the motor isn't turning is totally normal. What we don't want to see is a loss of oil pressure, the light comes on and does not go off, but perhaps the gauge is not functioning correctly? Of course pressure will reduce with engine speed. long as it's not zero~

61,015

If you've got high mileage it could be worn bearings, or worn gears in the oil pump. HTH. -Jim

1 out of 1 people think this is helpful.
40

oil pump most probably. _____________________________________________ www.dvdvideosoft.com

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