why is it losing oil pressure
The engine is old and oil pressure is dependent on engine speed and bearing clearances. Has the idle speed dropped?
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~
If you've got high mileage it could be worn bearings, or worn gears in the oil pump. HTH. -Jim
oil pump most probably. _____________________________________________ www.dvdvideosoft.com
Looking for a Used Yukon XL in your area?
CarGurus has 13,114 nationwide Yukon XL listings starting at $1,495.
Search GMC Yukon XL Questions
GMC Yukon XL Experts
Related Models For Sale
Used Cars For Sale