Oil pressure gage fluctuations in a 2014 GMC Yukon XL

Asked by Jun 22, 2019 at 08:07 PM about the 2014 GMC Yukon XL

Question type: Maintenance & Repair

What causes my oil pressure gage to
fluctuate while driving. It drops when
stopped and increases when I  
accelerate. I have a 2014 GMC Yukon.

1 Answer

119,485

Sounds normal. The oil pump is driven by the camshaft. At idle the camshaft is spinning slowly so the oil pump is pumping less. When you accelerate the engine speed increases and the camshaft is spinning faster so the oil pump is pumping more. That's why the oil pressure and the gauge on the dash fluctuates. Hope that helps! Jim

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