2009 Chevrolet Silverado 3500 HD Oil Filter Adapter

You should remove the charge air inlet pipe, the cooling fan shroud bracket bolts, the cooling fan shroud bracket, the lower exhaust gas recirculation (EGR) cooler pipe, the oil pan skid plate bolts and plate, the oil filter, the oil cooler adapter nuts and studs from the flywheel housing, the oil cooler assembly bolts, the oil cooler adapter bolts, the oil cooler, and adapter, the coolant pipe nuts, the coolant pipe, the oil filter adapter/oil cooler O-ring seals and the coolant pipe O-ring and gasket.