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    5.3& 6.0 GM trucks losing oil pressure PF48E

    5.3/6.0 GM V8s plugging up oil filters, oil pressure dropping to near zero. Why doesn't the oil filter bypass valve open preventing the drop in oil pressure? Hello, Roy Gage from Estherville Iowa where I run a small automotive repair shop. I will tell you what I know, what I think I know, what...
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