GM Service Manual Online
For 1990-2009 cars only

Special Tools

J 39400-A Halogen Leak Detector

Removal Procedure

  1. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection.
  2. Drain the coolant. Refer to Cooling System Draining and Filling.
  3. Remove the inlet heater hose at the heater core. Refer to Heater Inlet Hose Replacement.
  4. Remove the outlet heater hose at the heater core. Refer to Heater Outlet Hose Replacement.
  5. Recover the refrigerant. Refer to Refrigerant Recovery and Recharging.
  6. Remove the suction hose at the thermostatic expansion valve. Refer to Air Conditioning Evaporator Thermal Expansion Valve Replacement.
  7. Remove the liquid line at the thermostatic expansion valve. Refer to Air Conditioning Evaporator Thermal Expansion Valve Replacement.
  8. Remove and discard the sealing washers.

  9. Object Number: 2056941  Size: SH

    Note: Plug the heater core pipes and the TXV opening to prevent coolant or polyalkylene glycol (PAG) oil from leaking into the interior.

    Plug all A/C components immediately to prevent system contamination.

  10. Remove the HVAC module to front of dash plate bolts (1).
  11. Remove the front floor console. Refer to Front Floor Console Replacement.
  12. Remove the body control module. Refer to Body Control Module Replacement.
  13. Remove the right and left instrument panel insulator panels. Refer to Instrument Panel Insulator Replacement - Right Side and Instrument Panel Insulator Replacement - Left Side.
  14. Remove both the right and left instrument panel outer trim panels. Refer to Instrument Panel Outer Trim Cover Replacement.

  15. Object Number: 2056944  Size: SH
  16. Disconnect the instrument panel to the body wire harness and antenna connectors on the left side of the instrument panel (1).

  17. Object Number: 2056945  Size: SH
  18. Disconnect the instrument panel to the wire harness connectors on the right side of the instrument panel (1).
  19. Remove the drivers knee bolster panel. Refer to Driver Knee Bolster Panel Replacement.
  20. Remove the steering column assembly. Refer to Steering Column Replacement.

  21. Object Number: 2056947  Size: SH
  22. Remove the crush bracket to the front of dash plate nuts (1).
  23. Position the front seat in the full rearward position.
  24. Remove the brake pedal assembly. Refer to Brake Pedal Assembly Replacement.
  25. Remove the shifter assembly. Refer to Transmission Control Replacement.
  26. Remove both right and left windshield pillar garnish moldings. Refer to Windshield Pillar Garnish Molding Replacement.
  27. Remove the instrument panel upper trim panel. Refer to Instrument Panel Upper Trim Panel Replacement.

  28. Object Number: 2056948  Size: SH
  29. Remove the left side instrument panel to body bolts (1).

  30. Object Number: 2056949  Size: SH
  31. Remove the right side instrument panel to body bolts (1).
  32. Remove the right hand floor heater duct at the center floor heater duct. Refer to Floor Rear Air Outlet Duct Replacement - Right Side.
  33. Remove the left hand floor heater duct at the center floor heater duct. Refer to Floor Rear Air Outlet Duct Replacement - Left Side.
  34. Remove the instrument panel assembly from the vehicle.

  35. Object Number: 2056950  Size: SH
  36. Remove and discard HVAC module drain seal (2) thermostatic expansion valve and dash seal (1).

Installation Procedure

  1. Install a new HVAC module drain seal (2) and dash seal (1).

  2. Object Number: 2056950  Size: SH
  3. Install the instrument panel assembly into the vehicle.
  4. Install the left hand floor heater duct at the center floor heater duct. Refer to Floor Rear Air Outlet Duct Replacement - Left Side.
  5. Install the right hand floor heater duct at the center floor heater duct. Refer to Floor Rear Air Outlet Duct Replacement - Right Side.
  6. Caution: Refer to Fastener Caution in the Preface section.


    Object Number: 2056949  Size: SH
  7. Install the right hand side instrument panel to body bolts (1) and tighten to 26 N·m (19 lb ft).

  8. Object Number: 2056948  Size: SH
  9. Install the left hand side instrument panel to body bolts (1) and tighten to 26 N·m (19 lb ft).
  10. Install the instrument panel upper trim panel. Refer to Instrument Panel Upper Trim Panel Replacement.
  11. Install both the right and left windshield pillar garnish moldings. Refer to Windshield Pillar Garnish Molding Replacement.
  12. Install the shifter assembly. Refer to Transmission Control Replacement.
  13. Install the brake pedal assembly. Refer to Brake Pedal Assembly Replacement.

  14. Object Number: 2056947  Size: SH
  15. Install the crush bracket to the front of dash plate nuts (1). Tighten the bolts to 10 N·m (89 lb in).
  16. Install the steering column assembly. Refer to Steering Column Replacement.
  17. Install the drivers knee bolster panel. Refer to Driver Knee Bolster Panel Replacement.

  18. Object Number: 2056945  Size: SH
  19. Connect the instrument panel to body wire harness connectors on the right side of the instrument panel (1).

  20. Object Number: 2056944  Size: SH
  21. Connect the instrument panel to body wire harness connectors and antennas on the left side of the instrument panel (1).
  22. Install the right and left instrument panel outer trim panels. Refer to Instrument Panel Outer Trim Cover Replacement.
  23. Install the right and left instrument panel insulator panels. Refer to Instrument Panel Insulator Replacement - Right Side and Instrument Panel Insulator Replacement - Left Side.
  24. Install the BCM. Refer to Body Control Module Replacement.
  25. Install the front floor console. Refer to Front Floor Console Replacement.

  26. Object Number: 2056941  Size: SH
  27. Install the HVAC module to the MOD plate bolts (1) and tighten to 4 N·m (35 lb in).
  28. Install new sealing washers. Refer to Sealing Washer Replacement.
  29. Install the liquid line at the TXV. Refer to Air Conditioning Evaporator Thermal Expansion Valve Replacement.
  30. Install the suction hose at the TXV. Refer to Air Conditioning Evaporator Thermal Expansion Valve Replacement.
  31. Evacuate and charge the refrigerant system. Refer to Refrigerant Recovery and Recharging.
  32. Leak test the fittings using the J 39400-A .
  33. Repair any leaks found.
  34. Install the outlet heater hose at the heater core. Refer to Heater Outlet Hose Replacement.
  35. Install the inlet heater hose at the heater core. Refer to Heater Inlet Hose Replacement.
  36. Fill the coolant. Refer to Cooling System Draining and Filling.
  37. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection.