GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

  1. Remove the instrument panel lower trim plate. Refer to Instrument Panel Lower Trim Plate Replacement .

  2. Object Number: 1397121  Size: SH
  3. Remove the HVAC control assembly mounting screws (1).

  4. Object Number: 1397027  Size: SH

    Important: Retaining clips hold the HVAC control assembly in place.

  5. Pull the HVAC control assembly rearward from the instrument panel.
  6. Disconnect the electrical connectors form the HVAC control assembly.
  7. Remove the HVAC control assembly.

Installation Procedure


    Object Number: 410369  Size: SH

    Important: The key should be in the off position when connecting the electrical connectors to ensure proper calibration.

  1. Connect the electrical connectors to the HVAC control assembly.

  2. Object Number: 1397027  Size: SH
  3. Install the HVAC control assembly.
  4. Notice: Refer to Fastener Notice in the Preface section.

  5. Install the HVAC control assembly mounting screws.
  6. Tighten
    Tighten the screws to 2 N·m (18 lb in).

  7. Install the instrument panel lower trim plate. Refer to Instrument Panel Lower Trim Plate Replacement .
  8. Important: Do not adjust any controls on the HVAC control assembly while the HVAC control assembly is calibrating. If interrupted improper HVAC performance will result.

  9. Start the engine and run for 1 minute.