GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2009 🢒 TrailBlazer - 4WD 🢒 HVAC 🢒 Heating, Ventilation, and Air Conditioning 🢒 Air Temperature Door Replacement

Removal Procedure
  1. Remove the HVAC module assembly (1). Refer to HVAC Module Assembly Replacement.

    2. Object Number: 741189 Size: SH
  2. Remove screws in order to separate the HVAC module assembly.
  3. Remove the screws from the air temperature actuator.
  4. Remove the air temperature actuator.
  5. Remove the screws from the mode actuator.
  6. Remove the mode actuator.
  7. Separate the HVAC module case halves.

    8. Object Number: 735973 Size: SH
  8. Remove the air temperature door (1) from the lower module half.

Installation Procedure

    Object Number: 735973 Size: SH
  1. Install the air temperature door (1) to the lower module half.
  2. Assemble the HVAC module case halves.
  3. Install the mode actuator.

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

  4. Install the screws to the mode actuator and tighten to 1.9 N·m (17 lb in).
  5. Install the air temperature actuator.
  6. Install the screws to the air temperature actuator and tighten to 1.9 N·m (17 lb in).

    7. Object Number: 741189 Size: SH
  7. Install the screws in order to assemble the HVAC module and tighten to 1.9 N·m (17 lb in).
  8. Install the HVAC module assembly (1). Refer to HVAC Module Assembly Replacement.