GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

  1. Remove the HVAC module. Refer to HVAC Module Assembly Replacement.
  2. Disconnect all associated wiring connections attached to the HVAC module.

  3. Object Number: 1379002  Size: SH
  4. Remove the HVAC module case screws.

  5. Object Number: 1379007  Size: SH
  6. Remove the HVAC module retainer clips.

  7. Object Number: 1378984  Size: SH
  8. Separate the HVAC module case.

  9. Object Number: 1378986  Size: SH
  10. Reposition the evaporator core to access the evaporator sensor.

  11. Object Number: 802751  Size: SH
  12. Remove the evaporator sensor and harness from the evaporator core.

Installation Procedure

  1. Add refrigerant oil to the evaporator core. Refer to Refrigerant System Capacities.
  2. Install the new evaporator core seals to evaporator.

  3. Object Number: 802751  Size: SH
  4. Install the evaporator sensor and harness to the evaporator.

  5. Object Number: 1378986  Size: SH
  6. Install the evaporator core.

  7. Object Number: 1378984  Size: SH
  8. Connect the HVAC module case halves together.

  9. Object Number: 1379003  Size: SH
  10. Reposition and connect the HVAC Module wiring harness (1).

  11. Object Number: 1379007  Size: SH
  12. Install the HVAC module retainer clips.
  13. Caution: Refer to Fastener Caution in the Preface section.


    Object Number: 1379002  Size: SH
  14. Install the HVAC module case screws.
  15. Tighten
    Tighten the screws to 1 N·m (9 lb in).

  16. Reconnect all associated wiring connections attached to the HVAC module.
  17. Install the HVAC module. Refer to HVAC Module Assembly Replacement.