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Re: Duramax runs hot-Water Pump?
Posted to HD/Fleet Forum on 2/23/2021

Can you define hot? If I was a guessing man, before a water pump it would more likely be head gaskets. Two tests I do. The easiest is run it down the road and park it for about eight hours. Then grab a hold of the upper hose. If it is hard as a wedding prick t... Login to read more.