GM Service Manual Online
For 1990-2009 cars only

Discharge Hose Replacement LR4, LM7, LQ4 w/ Denso

Removal Procedure

  1. Recover the refrigerant. Refer to Refrigerant Recovery and Recharging .

  2. Object Number: 628247  Size: SH
  3. Remove the discharge hose mounting bolt from the compressor.
  4. Remove the discharge hose from the compressor.
  5. Remove the upper radiator baffle. Refer to Radiator Air Baffle Assemblies and Deflectors in Engine Cooling.

  6. Object Number: 363062  Size: SH
  7. Remove the nut at the condenser.
  8. Remove the discharge hose from the condenser.
  9. Disconnect the automatic recirculation electrical connector from the discharge hose.
  10. Remove the discharge hose assembly from the vehicle.
  11. Discard all of the used sealing washers. Cap the system openings.

Installation Procedure

  1. Install the discharge hose assembly to the vehicle.
  2. Connect the automatic recirculation electrical connector to the discharge hose.

  3. Object Number: 363062  Size: SH
  4. Install the hose to the condenser using new sealing washers.
  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 nut at the condenser.
  7. Tighten
    Tighten the nut to 16 N·m (12 lb ft).

  8. Install the upper baffle. Refer to Radiator Air Baffle Assemblies and Deflectors in Engine Cooling.

  9. Object Number: 628247  Size: SH
  10. Install the discharge hose to the compressor using new sealing washers.
  11. Install the discharge hose mounting bolt.
  12. Tighten
    Tighten the nut to 16 N·m (12 lb ft).

  13. Recharge the A/C system. Refer to Refrigerant Recovery and Recharging .
  14. Inspect the system for leaks. Refer to Leak Testing .