Installation Procedure

Important:  The left and right air temperature doors pivot in the center.

1. Install the air temperature doors (1, 2).

   Carefully align the air temperature door into the HVAC module case.

   Fig 1: Installing Air Temperature Doors

   Courtesy of GENERAL MOTORS CORP.
2. Install the new case seal (2) into the HVAC module case (1).
   Fig 2: Installing New Case Seal

   Courtesy of GENERAL MOTORS CORP.

   Important: Inspect the condition of the retaining tab on the upper module case prior to installing the lower module case. If the retaining tab is broken or damaged, install an external retaining clip, P/N 52458793, or equivalent. 

3. Align and install the upper HVAC module case to the lower module case.

   Align and secure the retaining tab (1) on the upper module case to the retaining slot on the lower module case.

   NOTE: Refer to FASTENER NOTICE .
4. Install the HVAC module assembly upper mounting screws.

   Tighten 

   Tighten the screws to 1.5 N.m (13 lb in).

   Fig 3: Installing Upper HVAC Module Case To Lower Module Case

   Courtesy of GENERAL MOTORS CORP.
5. Install the recirculation housing (2).
6. Install the recirculation housing retaining screws (1).

   Tighten 

   Tighten the screws to 1.5 N.m (13 lb in).

   Fig 4: Installing Recirculation & Housing Retaining Screws

   Courtesy of GENERAL MOTORS CORP.
7. Position the right air temperature actuator, then align the slots in the electric actuator drive to the flats of the shaft.
8. Align the locating hole to the alignment pin on the HVAC module case.
9. Slide the actuator drive on the shaft. The actuator drive should set completely on the shaft and the mounting holes should be flush with the mounting screws on the HVAC module case.
   NOTE: Refer to FASTENER NOTICE .
10. Install the screws to the right air temperature actuator.

    Tighten 

    Tighten the screws to 1.5 N.m (13 lb in).

11. Position the left air temperature actuator, then align the slots in the electric actuator drive to the flats of the shaft.
    Fig 5: Installing Screws To Right Air Temperature Actuator

    Courtesy of GENERAL MOTORS CORP.
12. Align the locating hole to the alignment pin on the HVAC module case.
13. Slide the actuator drive on the shaft. The actuator drive should set completely on the shaft and the mounting holes should be flush with the mounting screws on the HVAC module case.
14. Install the screws to the left air temperature actuator.

    Tighten 

    Tighten the screws to 1.5 N.m (13 lb in).

15. Install the HVAC module. Refer to HVAC Module Assembly Replacement  .