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Home >> Hummer >> 2008 >> H3 Base, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 133 (HVAC System - Automatic) >> Repair Instructions >> HVAC Control Module Replacement >> Installation Procedure
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Installation Procedure

WARNING: This page is about a different car, the 2008 Chevrolet Malibu Classic. However, it is still accessible from the selected car via links, so may be relevant.
    IMPORTANT: The key should be in the OFF position when connecting the electrical connectors to ensure proper calibration.
  1. Install the HVAC control module wire harness connectors.
  2. Fig 1: Identifying HVAC Control Module
    GM1203599Courtesy of GENERAL MOTORS CORP.
  3. Install the HVAC control module.
  4. NOTE: Refer to Fastener Notice .
  5. Tighten the HVAC control module screws.

    Tighten:  Tighten the screws to 2.5 N.m (22 lb in).

  6. Install the I/P center trim panel. Refer to Instrument Panel Center Trim Panel Replacement .
  7. IMPORTANT: Do not adjust any controls on the HVAC control module while the HVAC control module is calibrating. If interrupted improper HVAC performance will result.
  8. Start the engine and let run for one minute.
  9. Refer to Control Module References for programming and setup information.