GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Isuzu 🢒 2009 🢒 Ascender - 4WD 🢒 Power and Signal Distribution 🢒 Data Communications 🢒 HVAC Control Module Replacement

Removal Procedure

    Object Number: 735898 Size: SH
  1. Remove the I/P accessory trim plate. Refer to Instrument Panel Accessory Trim Plate Replacement or Instrument Panel Cluster Trim Plate Bezel Replacement.
  2. Remove the control module retaining screws.
  3. Depress the HVAC control module retaining tabs (3) and remove the HVAC control module (2) from the instrument panel (4).
  4. Disconnect the electrical connectors (1) from the HVAC control module (2).

Installation Procedure

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


    Object Number: 810847 Size: SH
  1. Connect the electrical connectors to the HVAC control module (2).

    2. Object Number: 735898 Size: SH
  2. Install the HVAC control module (2) to the instrument panel (4), ensuring that the HVAC control module retaining tabs (3) lock into place.

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

  3. Install the HVAC control module retaining screws.

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

  4. Install the I/P accessory trim plate. Refer to Instrument Panel Accessory Trim Plate Replacement or Instrument Panel Cluster Trim Plate Bezel Replacement.

    5. Note: Do not adjust any controls on the HVAC control module while the HVAC control module is calibrating.

    If interrupted, improper HVAC performance will result.

  5. Start the engine and let run for 1 minute.