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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1725 (HVAC Systems - Manual) >> Repair Instructions >> Defroster Actuator Replacement >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2003 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
  1. Align the flats on the actuator opening with the flats on the door shaft.
    2. Fig 1: Installing Defroster Actuator To HVAC Control Module
    GM932987Courtesy of GENERAL MOTORS CORP.
    NOTE: Refer to FASTENER NOTICE in Cautions and Notices.
  2. Install the actuator screws to the HVAC module.

    Tighten:  Tighten the screws to 1 N.m (9 lb in).

  3. Connect the electrical connector to the actuator.
    4. IMPORTANT: Any time an HVAC module mode actuator or the HVAC control module is replaced, the HVAC control module must be calibrated to ensure proper air distribution.
  4. Calibrate the mode door by simultaneously pushing the A/C and RECIRC buttons on the HVAC control module three times each, within two seconds of initial push.
    • The A/C and RECIRC button LED's will flash while this calibration is taking place.
    • The calibration will take anywhere between 10 to 30 seconds depending on battery voltage.
    • The LED's will quit flashing when the calibration is complete.
  5. Cycle the ignition and verify proper operation.
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