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Why is the oil pressure high on a GMC Yukon Denali with a 6.2 Litre engine?

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Cody said:
It started started this when it started to get cold.
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When cold in winter you should see 80psi on start then pressure at operating temp should be 40-45psi and this is normal. Your user manual it says only 5w-30 or 10w-30 and do not use additives. Thicker oil viscosity like cold engine oil will offer more resistance to flow that would increase your oil pressure reading.;)
 

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