GM Service Manual Online
For 1990-2009 cars only

Secondary Mode Door Replacement Single Zone

Removal Procedure

  1. Remove the heater core cover. Refer to Heater Core Cover Replacement .

  2. Object Number: 867765  Size: SH
  3. Disconnect and remove the right hand mode door lever from the mode door.

  4. Object Number: 867766  Size: SH
  5. Disconnect and remove the secondary mode door lever from the secondary mode door.

  6. Object Number: 868074  Size: SH
  7. Remove the secondary mode door from the HVAC module.

Installation Procedure


    Object Number: 868074  Size: SH
  1. Install the secondary mode door.

  2. Object Number: 867766  Size: SH
  3. Connect the secondary mode door lever to the secondary mode door.

  4. Object Number: 867765  Size: SH

    Important: Align the pin on the right hand mode door lever with the slot on the secondary mode door lever.

  5. Connect the right hand mode door lever to the mode door.
  6. Install the heater core cover. Refer to Heater Core Cover Replacement .

Secondary Mode Door Replacement Dual Zone

Removal Procedure

  1. Remove the heater core cover. Refer to Heater Core Cover Replacement .
  2. Remove the right hand air temperature actuator. Refer to Temperature Valve Actuator Replacement - Right Side for the manual system or Temperature Valve Actuator Replacement - Right Side for the automatic systems.

  3. Object Number: 868233  Size: SH
  4. Remove the right hand air temperature mounting bracket screws.
  5. Remove the right hand air temperature mounting bracket.

  6. Object Number: 867765  Size: SH
  7. Disconnect and remove the right hand mode door lever from the mode door.

  8. Object Number: 867766  Size: SH
  9. Disconnect and remove the secondary mode door lever from the secondary mode door.

  10. Object Number: 868074  Size: SH
  11. Remove the secondary mode door from the HVAC module.

Installation Procedure


    Object Number: 868074  Size: SH
  1. Install the secondary mode door.

  2. Object Number: 867766  Size: SH
  3. Connect the secondary mode door lever to the secondary mode door.

  4. Object Number: 867765  Size: SH

    Important: Align the pin on the right hand mode door lever with the slot on the secondary mode door lever.

  5. Connect the right hand mode door lever to the mode door.

  6. Object Number: 868233  Size: SH
  7. Install the right hand air temperature mounting bracket.
  8. 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.

  9. Install the right hand air temperature mounting bracket screws.
  10. Tighten
    Tighten the screws to 0.9 N·m (8 lb in).

  11. Install the right hand air temperature actuator. Refer to Temperature Valve Actuator Replacement - Right Side for the manual system or Temperature Valve Actuator Replacement - Right Side for the automatic system.
  12. Install the heater core cover. Refer to Heater Core Cover Replacement .