Question about 1991 GMC K2500

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Oil presser ok when i start me gmc 1500 4x4 the oil persser is really good and as it wormes up the oil persser gos down i just changed the oil and filter in it and now that is what it is doing can you help me plz

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The oil pressure should go down after the engine heats up because of its viscosity. When you accelerate the pressure should go up and at idlen the pressure goes down. 20-40 psi range is normal.

Posted on Jan 15, 2009

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