GM Service Manual Online
For 1990-2009 cars only

Suction Hose Replacement LA1

Tools Required

J 39400-A Halogen Leak Detector

Removal Procedure

  1. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.
  2. Recover the refrigerant from the A/C system. Refer to Refrigerant Recovery and Recharging .
  3. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.

  4. Object Number: 125807  Size: SH
  5. Remove the air baffle bolts.
  6. Remove the air baffle.
  7. Remove the suction hose to evaporator outlet tube bolt.

  8. Object Number: 826687  Size: SH
  9. Disconnect the evaporator outlet tube from the suction hose.
  10. Important: Cap or tape the open A/C hose immediately to prevent system contamination.

  11. Cap or tape off the evaporator outlet tube.

  12. Object Number: 794148  Size: SH
  13. Disconnect the A/C compressor electrical connector.
  14. Disconnect the engine harness electrical conenctor above the A/C compressor and reposition the wiring harness aside.

  15. Object Number: 791146  Size: SH
  16. Remove the suction hose to compressor nut.
  17. Disconnect the suction hose from the compressor.
  18. Cap or tape off the compressor suction port.

  19. Object Number: 792869  Size: SH
  20. Lower the vehicle.
  21. Loosen the right hand engine mount strut, engine side.
  22. Remove the right hand engine mount strut bracket brace bolts from the upper radiator support and rotate the strut and bracket rearward.
  23. Remove the suction hose.
  24. Remove and discard the sealing washers.

Installation Procedure

  1. Install a new sealing washer onto the compressor end of the suction hose. Refer to Sealing Washer Replacement .
  2. Install the suction hose.

  3. Object Number: 792869  Size: SH
  4. Position the engine mount strut bracket flush with the upper radiator support.
  5. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  6. Install the right hand engine mount strut bracket brace bolts to the upper radiator support.
  7. Tighten
    Tighten the bolts to 28N·m (21 lb ft).

  8. Tighten the right hand engine strut mount nuts, engine side.
  9. Tighten
    Tighten the bolts to 48N·m (35 lb ft).

  10. Raise the vehicle.
  11. Remove the cap or tape from the compressor suction port.

  12. Object Number: 791146  Size: SH
  13. Connect the suction hose to the compressor.
  14. Install the suction hose to compressor nut.
  15. Tighten
    Tighten the nut to 16 N·m (12 lb ft).


    Object Number: 794148  Size: SH
  16. Connect the engine harness electrical connector above the A/C compressor.
  17. Connect the A/C compressor electrical connector.
  18. Install a new sealing washer at the suction hose to evaporator outlet tube fitting. Refer to Sealing Washer Replacement .
  19. Remove the cap or tape from the evaporator outlet tube.

  20. Object Number: 826687  Size: SH
  21. Connect the suction hose to the evaporator outlet tube fitting.
  22. Install the suction hose to evaporator outlet tube bolt.
  23. Tighten
    Tighten the bolt to 16 N·m (12 lb ft).


    Object Number: 125807  Size: SH
  24. Install the air baffle.
  25. Install the air baffle bolts.
  26. Tighten
    Tighten the bolt to 20 N·m (15 lb ft).

  27. Lower the vehicle.
  28. Evacuate and recharge the A/C system. Refer to Refrigerant Recovery and Recharging .
  29. Leak test the fittings of the component using J 39400-A
  30. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.

Suction Hose Replacement LY7

Tools Required

J 39400-A Halogen Leak Detector

Removal Procedure

  1. Recover the refrigerant from the A/C system. Refer to Refrigerant Recovery and Recharging .
  2. Remove the bolt that secures the suction hose to the evaporator outlet tube.

  3. Object Number: 826687  Size: SH
  4. Disconnect the evaporator outlet tube from the suction hose.
  5. Important: Cap or tape the open A/C hose immediately to prevent system contamination.

  6. Cap or tape off the evaporator outlet tube.

  7. Object Number: 791146  Size: SH
  8. Remove the nut that secures the suction hose to the compressor.
  9. Disconnect the suction hose from the compressor.
  10. Cap or tape off the compressor suction port.
  11. Remove the suction hose.
  12. Remove and discard the sealing washers.

Installation Procedure

  1. Install a new sealing washer onto the compressor end of the suction hose. Refer to Sealing Washer Replacement .
  2. Install the suction hose.
  3. Remove the cap or tape from the compressor suction port.

  4. Object Number: 791146  Size: SH
  5. Connect the suction hose to the compressor.
  6. Notice: Refer to Fastener Notice in the Preface section.

  7. Install the nut that secures the suction hose to the compressor.
  8. Tighten
    Tighten the nut to 16 N·m (12 lb ft).

  9. Install a new sealing washer between the suction hose and the evaporator outlet tube fitting. Refer to Sealing Washer Replacement .
  10. Remove the cap or tape from the evaporator outlet tube.

  11. Object Number: 826687  Size: SH
  12. Connect the suction hose to the evaporator outlet tube fitting.
  13. Install the bolt to secure the suction hose to the evaporator outlet tube.
  14. Tighten
    Tighten the bolt to 16 N·m (12 lb ft).

  15. Evacuate and recharge the A/C system. Refer to Refrigerant Recovery and Recharging .
  16. Use J 39400-A to leak test the fittings of the component
  17. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.