GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2008 🢒 Yukon XL Denali 🢒 Engine 🢒 Engine Mechanical - Hybrid (HP2) 6.0L (LFA) 🢒 Positive Crankcase Ventilation Hose/Pipe/Tube Replacement

Removal Procedure

    Object Number: 1696791 Size: SH
  1. Remove the intake manifold sight shield. Refer to Upper Intake Manifold Sight Shield Replacement .
  2. Remove the positive crankcase ventilation (PCV) dirty air hose from the intake manifold fitting and left valve rocker arm cover, if required.

    3. Object Number: 1696754 Size: SH
  3. Remove the PCV fresh air tube (1) from the air cleaner outlet duct, if required.

    4. Object Number: 1696757 Size: SH
  4. Remove the PCV fresh air tube (1) from the right valve rocker arm cover fitting (2), if required.
  5. Remove the appropriate PCV hose/tube from the vehicle.

Installation Procedure

    Object Number: 1696757 Size: SH
  1. Install the appropriate PCV hose/tube to the vehicle.
  2. Install the PCV fresh air tube (1) to the right valve rocker arm cover fitting (2), if required.

    3. Object Number: 1696754 Size: SH

    Important: Route the PCV tube between the engine harness and generator battery jumper cable.

  3. Install the PCV fresh air tube (1) to the air cleaner outlet duct, if required.

    4. Object Number: 1696791 Size: SH
  4. Install the PCV dirty air hose to the intake manifold fitting and left valve rocker arm cover, if required.
  5. Install the intake manifold sight shield. Refer to Upper Intake Manifold Sight Shield Replacement .