my 2015 2500HD 6.0L knocks on startup. (Less than a minute) Can this be fixed or eliminated?
Mine is a 2013 2500hd 6.0 an I have the same problem its worse when it's cold which is odd cause the oil would be thicker. But I also have 180xxx miles lol so that's very odd for a new truck to do that. You still use the oem ac delco oil filter and oil? Also you park on a hill or flat?
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