GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2004 🢒 Express 🢒 Engine 🢒 Engine Mechanical - 4.3L 🢒 Positive Crankcase Ventilation Hose/Pipe/Tube Replacement

Removal Procedure
  1. Remove the engine cover. Refer to Engine Cover Replacement in Interior Trim.

    2. Object Number: 183399 Size: SH
  2. Disconnect the positive crankcase ventilation (PCV) tube from the air cleaner duct.
  3. Disconnect the PCV tube from the right valve rocker arm cover.

    4. Object Number: 172995 Size: SH
  4. Disconnect the PCV valve hose assembly from the intake manifold.
  5. Disconnect the PCV valve hose assembly from the left valve rocker arm cover.
  6. Inspect the tube and hose for cuts or cracking.
  7. Inspect the grommets in the valve rocker arm covers for cuts or cracking.
  8. Replace the PCV hose/tube as required.

Installation Procedure

    Object Number: 172995 Size: SH
  1. Connect the PCV valve hose assembly to the intake manifold.
  2. Connect the PCV valve hose assembly to the left valve rocker arm cover.

    3. Object Number: 183399 Size: SH
  3. Connect the positive crankcase PCV tube to the air cleaner duct.
  4. Connect the PCV tube to the right valve rocker arm cover.
  5. Install the engine cover. Refer to Engine Cover Replacement in Interior Trim.