GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 517338  Size: SH
  1. Remove the HVAC control assembly. Refer to Heater and Air Conditioning Control Replacement .
  2. Remove the HVAC control assembly selector switch screws (2, 4).
  3. Remove the HVAC control assembly vacuum valve (3) from the selector switch (5).

Installation Procedure


    Object Number: 517338  Size: SH
  1. Install the HVAC control assembly vacuum valve (3) to the selector switch (5).
  2. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  3. Install the HVAC control assembly selector switch screws (2, 4).
  4. Tighten
    Tighten the HVAC control assembly selector switch screws to 2 N·m (18 lb in).

  5. Install the HVAC control assembly. Refer to Heater and Air Conditioning Control Replacement .