Chevy and GMC Duramax Diesel Forum banner
  • Hey Everyone! Enter your ride HERE to be a part of this months Ride of the Month Challenge!

smoke crankcase pressure

  1. 01-04.5 LB7 Duramax Powertrain
    :help Excessive pressure from the oil filler cap and pcv tube, enough to blow the cap off if I loosen it, and purplish/grey smoke, the kind that makes me want to fill the side of the truck full of chevron stickers and the box full of dead fish and birds. I look like such a planet killer when I...