SDMExplorerSep 09, 2014Gmc grease fittingsHave a 2011 GMC 3500 Duramax. Two of the grease fittings are hard to get to, would like to change to 90 degree fittings. Does anyone know the tread size of the fittings.
Sport45Explorer IISep 10, 2014Good info, but his 2011 should only have 9 fittings.Post from LML Duramax Forum
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