GM Service Manual Online
For 1990-2009 cars only

    Object Number: 892663  Size: SH
  1. For vehicles equipped with a standard HVAC only - Remove the temperature cable housing from the retainer clip and remove the cable eyelet from the temperature door lever.
  2. Remove the electrical connectors from the control head and remove the control head.

  3. Object Number: 893594  Size: SH
  4. Remove the blower motor housing screws, release both tabs, and remove the housing.
  5. Lift the blower motor upward and disconnect the blower motor electrical connector by squeezing the bottom of the connector while pulling downward.

  6. Object Number: 892662  Size: SH
  7. Remove the HVAC module electrical harness connectors from the mode actuator, blower resistor card, and recirculation actuator. Pull the blower motor harness grommet out of the case.

  8. Object Number: 893478  Size: SH
  9. Remove the harness screw at the mode actuator on the case.
  10. Remove the harness main connector by sliding the harness towards the left.

  11. Object Number: 892666  Size: SH
  12. Remove the connector duct screw and pull the connector duct downward to remove.

  13. Object Number: 892670  Size: SH
  14. Remove the mode actuator screws and remove the actuator.

  15. Object Number: 892694  Size: SH
  16. Remove the mode cam.

  17. Object Number: 892695  Size: SH
  18. Remove the primary lever screws and remove the primary levers.

  19. Object Number: 892696  Size: SH
  20. Pry the sub-levers off with a flat-blade screwdriver.

  21. Object Number: 892697  Size: SH
  22. Remove the recirculation actuator screws and remove the actuator.

  23. Object Number: 878160  Size: SH
  24. For vehicles equipped with standard HVAC only - Remove the blower motor resistor card screws and remove.
  25. For vehicles equipped with automatic climate control only - Remove the blower motor control module.

  26. Object Number: 894750  Size: SH
  27. Remove the temperature door actuator.

  28. Object Number: 894458  Size: SH
  29. Remove the lower insulator by stretching past the 2 hooks on the bottom case and pulling forward.

  30. Object Number: 894256  Size: SH
  31. Open the heater core pipe connector collars and remove. Clamps may need to be rotated to gain access to the retaining tab. Pull the heater core pipes out of the heater core and through the HVAC module case to remove.

  32. Object Number: 894259  Size: SH
  33. Remove the heater core retainer and slide the heater core out of the module.

  34. Object Number: 894339  Size: SH
  35. Turn the module upside down and remove the lower case screws and remove the lower case.
  36. Remove the evaporator, the TXV, and the seal by lifting straight up. Remove the TXV and the seal from the evaporator.

  37. Object Number: 892701  Size: SH
  38. Turn the module right side up and use a razor blade to cut the defroster/vent seal and blower motor opening seal at the center line.

  39. Object Number: 894314  Size: SH
  40. Release the recirculation door connecting rod from the retainer.
  41. Remove the rod from the small door lever and remove.
  42. Remove the large and small recirculation doors.

  43. Object Number: 894361  Size: SH

    Important: 

       • There are 2 clips and 9 screws. Two screws are located in deep cavities.
       •  One screw is located at the center of the case.

  44. Remove the case half retainer clips and screws.

  45. Object Number: 892704  Size: SH
  46. With case laying on the left side, lift the right side straight up to split the module.

  47. Object Number: 894376  Size: SH
  48. Remove the mode and temperature doors.