2011-2016 Duramax LML CCV/PCV Re-Route Kit (LML-INT-A031)2011 2016 Duramax LML CCV PCV Re Route Kit (LML INT A031) The Dirty Diesel PCV Re Route Package is designed in house and has an optional resonator delete for the 2011 LML Duramax. From the factory, your LML routes your crankcase exhaust gases back into the intake tract which will quickly cause issues due to the build up of sludge and carbon. Our in house designed kit re routes these gases and completely stops the sludge build up simultaneously