GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 2004 🢒 GTO 🢒 HVAC 🢒 HVAC Systems - Manual 🢒 Mode Valve Actuator Replacement

Removal Procedure

    Object Number: 1378887 Size: MH
  1. Remove the HVAC unit. Refer to HVAC Module Assembly Replacement in Heating, Ventilation and Air Conditioning.
  2. Disconnect the vacuum lines (5) from the actuator (4).
  3. Remove the clip (2), spacers (3,8) and actuator rod (6) from the lever (1).
  4. Remove the actuator retaining nuts (7).
  5. Remove the actuator from the HVAC unit (9).

Installation Procedure

    Object Number: 1378887 Size: MH
  1. Install the actuator (4) to the HVAC unit (9).

    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.

  2. Secure the actuator with the actuator retaining nuts (7).

    3. Tighten
    Tighten the cover nuts to 4 N·m (35 lb in).

  3. Install the clip (2), spacers (3,8) and actuator rod (6) to the lever (1).
  4. Connect the vacuum lines (5) to the actuator.
  5. Install the HVAC unit. Refer to HVAC Module Assembly Replacement in Heating, Ventilation and Air Conditioning.