Thread: A rather Iowa find: 1961 GMC 1/2 ton Dually
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Old December 7th, 2020, 11:48 PM
James James is offline
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Join Date: Jun 2013
Location: Greer, SC
Truck: 1964 GMC 1500 2wd
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Default Re: A rather Iowa find: 1961 GMC 1/2 ton Dually
If you have change the oil after you got it. I would check the oil filter. It is possible the previous owner never gave it proper care. With fresh oil it could have loosen up the crude, plugged the filter, and allow the oil filter bypass to open passing that crude to the bearings.
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