GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

  1. Remove intake manifold. Refer to Intake Manifold Replacement.

  2. Object Number: 2016491  Size: SH
  3. Using the ball joint lock nut wrench (22 mm), remove the ventilation valve (1).

Installation Procedure


    Object Number: 2017142  Size: SH
  1. Apply adhesive (1) to 2 or 3 threads of the ventilation valve.
  2. Caution: Refer to Fastener Caution in the Preface section.


    Object Number: 2016491  Size: SH
  3. Using the ball joint lock nut wrench (22 mm), install the ventilation valve (1) and tighten.
  4. • Without a ball joint lock nut wrench to 20 N·m (15 lb ft)
    • With a ball joint lock nut wrench to 10 N·m (7 lb ft)
  5. Install intake manifold. Refer to Intake Manifold Replacement.