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GMC Yukon Oil Pressure
Specifically, I have to drive about 70 mph (I don't regularly do that) and let of the gas. After I've been driving for some time, the oil pressure will go down until I hit the gas again. It happened first about a year ago during the summer on a long trip. It happened again about two months ago at the beach. This past week it happened a lot.
Am I looking at a bad oil pump? Could it just be the sensor?