GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Saturn 🢒 2001 🢒 L100/L200/LW200 🢒 HVAC 🢒 Heating, Ventilation and Air Conditioning 🢒 HVAC Module Assembly

    Object Number: 894376 Size: SH
  1. Install temperature, heater, defroster, and vent doors into case.
  2. Install right side of case, carefully lining up door shafts with case openings.
  3. Verify that each door can be easily rotated through out its entire motion.

    4. Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 894361 Size: SH
  4. Install case screws and clips.

    5. Tighten
    Tighten the HVAC module screws to 1.0 N·m (9 lb in).


    Object Number: 894339 Size: SH
  5. Install evaporator into bottom of case.
  6. Install module lower case and install screws.

    7. Tighten
    Tighten the HVAC module screws to 1.0 N·m (9 lb in).


    Object Number: 894259 Size: SH
  7. Install heater core into case.

    8. Object Number: 894256 Size: SH

    Important: Verify that both pipes have a bushing and O-ring installed before installing into core.

  8. Install heater pipes into case and then into heater core. Shorter pipe is upper.
  9. Install heater pipe retaining clamps.

    10. Important: Lower heater pipe clamp hinge fits into the tab of the heater core retainer strap.

  10. Install heater core retaining strap.

    11. Object Number: 893650 Size: SH
  11. Install TXV/Heater pipe seal.
  12. Install TXV/Heater pipe seal.

    13. Tighten
    Tighten the TXV-to-block bolts to 7.0 N·m (62 lb in).


    Object Number: 894314 Size: SH
  13. Install recirculation doors.
  14. Install recirculation door rod to small door. With both doors held firmly closed, snap rod into retainer clip and close clip.

    15. Object Number: 892697 Size: SH
  15. Install recirculation actuator assembly onto door shaft. Shaft has two flats that must be aligned to actuator. Install recirculation actuator bracket to module screws.

    16. Tighten
    Tighten the recirculation actuator bracket-to-HVAC module screws to 1.0 N·m (9 lb in).


    Object Number: 892696 Size: SH
  16. Install vent and heater sub-levers. These sub-levers are identical and should have the slotted end inward.
  17. Install defrost door to sub-lever.

    18. Object Number: 892695 Size: SH
  18. Install vent primary lever.

    19. Tighten
    Tighten the vent primary lever fastener to 1.0 N·m (9 lb in).

  19. Install heater primary lever.

    20. Tighten
    Tighten the heater primary lever fastener to 1.0 N·m (9 lb in).


    Object Number: 892694 Size: SH
  20. Install cam. Rotate to verify proper installation.

    21. Object Number: 892670 Size: SH
  21. Install mode actuator.

    22. Tighten
    Tighten the mode actuator fastener to 1.0 N·m (9 lb in).


    Object Number: 878160 Size: SH
  22. For vehicles equipped with standard HVAC only - Install the blower motor resistor card.

    23. Tighten
    Tighten the blower motor resistor card fastener to 1.0 N·m (9 lb in).

  23. For vehicles equipped with automatic climate control only - Install the aspirator hose.

    24. Tighten
    Tighten the blower motor control module to 3.0 N·m (27 lb in).


    Object Number: 894050 Size: SH
  24. For vehicles equipped with standard HVAC vehicles - Install the temperature door cable eyelet over temperature door lever. Do not install housing into retaining clip at this time.
  25. Attach electrical harness to back of module. Connect actuators, blower resistor, and route to blower motor.

    26. Object Number: 892662 Size: SH
  26. For vehicles equipped with automatic climate control only - Attach the electrical harness to back of module. Connect the actuators, blower control module and route to blower motor.
  27. Push the blower motor harness grommet through hole then pull back to seat.
  28. Install the harness to case screw at mode actuator.

    29. Object Number: 893594 Size: SH
  29. Install blower motor assembly into module housing. Blower motor assembly rib must fit into channel in housing.
  30. Connect blower motor electrical connector.

    31. Object Number: 892666 Size: SH
  31. Install blower motor housing. Housing rib must fit into slot in case. Snap left and right clips into place and install screws.

    32. Tighten
    Tighten the blower motor housing screws to 1.0 N·m (9 lb in).

  32. Install connector duct to HVAC module and install screw.

    33. Tighten
    Tighten the HVAC module duct screws to 1.0 N·m (9 lb in).


    Object Number: 894458 Size: SH
  33. Install lower insulator into forward edge of case then stretch to hook on barbs.