AutoZone 1989 GMC Truck V1500 1/2ton Sub 4WD 5.7L TBI 8cyl | Repair Guides | Heating & Air Conditioning | Blend Door Actuator | Removal & Installation | AutoZone.com

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    1989 GMC Truck V1500 1/2ton Sub 4WD 5.7L TBI 8cyl

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    Avalanche, Sierra, Silverado, C&K Series, 1999-2005

    Removal & Installation

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    1. Remove the floor air outlet duct extension (1) from the floor duct (2).

      Click image to see an enlarged view

      Fig. Remove the floor air outlet duct extension (1) from the floor duct (2)

    2.  
    3. Disconnect the electrical connection at the blend door actuator (10).

      Click image to see an enlarged view

      Fig. Blend door actuator and related components

    4.  
    5. Remove the blend door actuator mounting screws from the HVAC module.
    6.  
    7. Remove the blend door actuator as an assembly with the actuator cam.

      Click image to see an enlarged view

      Fig. Remove the blend door actuator mounting screws from the HVAC module

    8.  

    To install:

    1. Install the blend door actuator as an assembly with the actuator cam.
      1. Line up the heater/defroster valve lever with the blend door actuator cam slot.
      2.  
      3. Line up the A/C valve lever with the blend door actuator cam
      4.  

    2.  
    3. Install the blend door actuator mounting screw to the HVAC module.
      1. Tighten the blend door actuator mounting screw to 14 inch lbs. (1.6 Nm).
      2.  

    4.  
    5. Connect the electrical connection at the blend door actuator (10).

      Click image to see an enlarged view

      Fig. Blend door actuator and related components

    6.  
    7. Install the floor air outlet duct extension (1) to the floor air duct (2).
    8.  

    1. Remove the floor air outlet duct extension (1) from the floor duct (2).

      Click image to see an enlarged view

      Fig. Remove the floor air outlet duct extension (1) from the floor duct (2)

    2.  
    3. Disconnect the electrical connection at the blend door actuator (10).

      Click image to see an enlarged view

      Fig. Blend door actuator and related components

    4.  
    5. Remove the blend door actuator mounting screws from the HVAC module.
    6.  
    7. Remove the blend door actuator as an assembly with the actuator cam.

      Click image to see an enlarged view

      Fig. Remove the blend door actuator mounting screws from the HVAC module

    8.  

    To install:

    1. Install the blend door actuator as an assembly with the actuator cam.
      1. Line up the heater/defroster valve lever with the blend door actuator cam slot.
      2.  
      3. Line up the A/C valve lever with the blend door actuator cam
      4.  

    2.  
    3. Install the blend door actuator mounting screw to the HVAC module.
      1. Tighten the blend door actuator mounting screw to 14 inch lbs. (1.6 Nm).
      2.  

    4.  
    5. Connect the electrical connection at the blend door actuator (10).

      Click image to see an enlarged view

      Fig. Blend door actuator and related components

    6.  
    7. Install the floor air outlet duct extension (1) to the floor air duct (2).
    8.  

     
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