GM Service Manual Online
For 1990-2009 cars only

Crankcase Ventilation System Inspection VIN 1

Removal Procedure


    Object Number: 12314  Size: MH
  1. While holding down the crankcase ventilation valve access cover (1), remove the 2 access cover retaining bolts.
  2. Remove the crankcase ventilation valve access cover (1).
  3. Remove the crankcase ventilation valve (2), spring, and O-ring (3).

Installation Procedure


    Object Number: 12314  Size: MH
  1. Install the crankcase ventilation valve (2), spring, and new O-ring (3).
  2. Reinstall the crankcase ventilation valve access cover (1).
  3. While holding down the crankcase ventilation valve access cover, install the access cover retaining bolts.

Crankcase Ventilation System Inspection VIN K

Removal Procedure

  1. Remove the injector sight shield from the fuel rail and intake manifold.

  2. Object Number: 12315  Size: MH
  3. Remove the MAP sensor (1).
  4. Use a 16 mm socket to press the access cover (2) down and rotate 1/4 turn counterclockwise.
  5. Remove the access cover.
  6. 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). If necessary, replace the O-ring (4).
  2. Install the access cover (2).
  3. Install the MAP sensor (1).
  4. Install the sight shield.