Doc's Diesel Chevrolet/GMC 6.6L Duramax 15W-40 Full Synthetic Oil + Filter Maintenance Kit 2014-2016Chevrolet/GMC 6.6L Duramax 15W-40 Full Synthetic Oil + Filter Maintenance Kit 2014-2016. Doc's Chevrolet/GMC 6.6L Duramax Fuel/Water Separator Filter 2001-2016.
