Question about GMC Jimmy

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After sitting al night whn i start my gmc jimmy it has a knocking sound for a short time during warm up..60 pounds oil pressure and sound goes away shortly

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If it is cold where you are....try a thinner oil. With thick oil, it will knock until the oil warms up and thins out...I hope that this was helpful for you. Take care and God bless.

Bryon

Posted on Feb 05, 2010

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