GM Service Manual Online
For 1990-2009 cars only

Crankcase Ventilation System Inspection VIN K

Removal Procedure

  1. Turn OFF the ignition.

  2. Object Number: 378514  Size: SH
  3. Remove the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement in Engine Mechanical .
  4. Disconnect the electrical connector (2) from the manifold absolute pressure (MAP) sensor (1).

  5. Object Number: 12315  Size: MH
  6. Remove the MAP sensor (1).
  7. Use a 16 mm socket to press the access cover (2) down, and rotate 1/4 turn counterclockwise.
  8. Remove the access cover.
  9. Remove the PCV valve (3) and the O-ring (4) from the intake manifold.

Installation Procedure


    Object Number: 12315  Size: MH
  1. Install the crankcase ventilation valve (3). Replace the O-ring (4) if necessary.
  2. Install the access cover (2).
  3. Install the MAP sensor.

  4. Object Number: 378514  Size: SH
  5. Connect the electrical connector (2) to the MAP sensor (1).
  6. Install the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement in Engine Mechanical.

Crankcase Ventilation System Inspection VIN 1

Removal Procedure

  1. Turn OFF the ignition.
  2. Remove the fuel injection sight shield. Refer to Fuel Injector Sight Shield Replacement in Engine Mechanical.

  3. Object Number: 393157  Size: SH
  4. Remove the 2 access cover retaining bolts (1) while holding down the access cover (2) of the crankcase ventilation valve.
  5. Remove the access cover (2).
  6. Remove the spring (3).
  7. Remove the crankcase ventilation valve (4) and the O-ring (5).

Installation Procedure


    Object Number: 393157  Size: SH
  1. Install the crankcase ventilation valve (4) and the O-ring (5).
  2. Install the spring (3).
  3. Install the access cover (2).
  4. Install the 2 access cover retaining bolts while holding down the access cover.
  5. Reinstall the fuel injection sight shield. Refer to Fuel Injector Sight Shield Replacement in Engine Mechanical .