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Home >> Cadillac >> 2000 >> Eldorado ESC >> Repair and Diagnosis >> External Pages >> Different car >> Section 249 (HVAC Systems - Automatic) >> Repair Instructions >> Defroster Actuator Replacement >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2004 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Defrost Door Lever & Actuator Pushrod
    GM295308Courtesy of GENERAL MOTORS CORP.
  1. Connect the defroster actuator pushrod to the defrost door lever.
    2. Fig 2: Passenger SIR Bracket & Defroster Actuator
    GM295306Courtesy of GENERAL MOTORS CORP.
  2. Position the actuator along side of the passenger SIR bracket in line with the mounting pins on the HVAC module case.
  3. Carefully rotate the actuator past the passenger SIR bracket, rearward and downward, until the actuator slots align with the HVAC module mounting pins.
  4. Inspect that the actuator pushrod is not binding on the defrost door lever.
  5. Push the actuator toward the HVAC module case to secure the retaining tab.
    6. Fig 3: RH Side Window Defogger Lower Outlet Duct
    GM295305Courtesy of GENERAL MOTORS CORP.
  6. Remove the flat bladed tool maintaining the defrost door lever in position.
  7. Connect the vacuum harness connectors to the defroster actuator.
  8. Position and connect the RH side window defogger lower outlet duct to the windshield defroster duct.
  9. Install the I/P upper trim pad. Refer to Trim Pad Replacement - Instrument Panel (I/P) Upper in Instrument Panel, Gages and Console.
  10. Recalibrate the actuators. Refer to Re-Calibrating Actuators .
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