GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2003 🢒 Express - AWD 🢒 Engine 🢒 Engine Mechanical - 4.3L 🢒 Positive Crankcase Ventilation Valve Replacement

Removal Procedure

    Object Number: 183399 Size: SH
  1. Remove the air cleaner assembly. Refer to Air Cleaner Assembly Replacement in Engine Controls - 4.3L.

    2. Object Number: 172995 Size: SH
  2. Disconnect the PCV valve hose assembly from the intake manifold.
  3. Disconnect the PCV valve hose assembly from the left valve rocker arm cover.
  4. Inspect the tube and hose for cuts or cracking.
  5. Inspect the grommets in the valve rocker arm covers for cuts or cracking.
  6. 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. Install the air cleaner assembly. Refer to Air Cleaner Assembly Replacement in Engine Controls - 4.3L.