GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2009 🢒 TopKick C-Series (Conventional) C6/C7/C8 🢒 HVAC 🢒 HVAC - Manual 🢒 Mode Door Replacement - Upper

Removal Procedure
  1. Remove the I/P carrier. Refer to Instrument Panel Carrier Replacement.
  2. Remove the heater assembly cover screws.
  3. Remove the heater assembly cover.

    4. Object Number: 691864 Size: SH
  4. Disconnect the vacuum hose from the upper mode actuator (1).
  5. Remove the upper mode actuator (1) from the heater assembly (4).
  6. Remove the linkage from the upper mode actuator (1).

    7. Object Number: 691841 Size: SH
  7. Remove the upper mode door (2) from the heater module (1).

Installation Procedure

    Object Number: 691841 Size: SH
  1. Install the upper mode door (2) to the heater module (1).
  2. Install the heater assembly cover.

    3. Caution: Refer to Fastener Caution in the Preface section.

  3. Install the heater assembly cover screws.

    4. Tighten
    Tighten screws to 1.9 N·m (17 lb in).


    Object Number: 691864 Size: SH
  4. Install the linkage to the upper mode actuator (1).
  5. Install the upper mode actuator (1) to the heater assembly (4).
  6. Connect the vacuum hose to the upper mode actuator (1).
  7. Install the I/P carrier. Refer to Instrument Panel Carrier Replacement.