FYI All:
I read on line that keeping the PCV Hose from air box to engine cleaned regularly helps.
Dealers are upgrading the PCV hoses to a larger 1/2″ diameter flexible hose w/ connectors and capping off the old PCV connector in the air box as a fix improving engine PCV and reducing risk of moisture freeze up and clogging of the line.
Also by adding a pressure relief oil fill cap (AC/ Delco P/N FC219) or keeping the existing pressure relief oil filler cap clean and functioning will help to reduce the risk of crankcase pressure buildup and rear main oil seal failure.
All The Best Chuck
