GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2008 🢒 Yukon XL Denali 🢒 HVAC 🢒 Heating, Ventilation, and Air Conditioning 🢒 Discharge Hose Replacement

Discharge Hose Replacement LY2, LMF, L76 and L92

Tools Required

J 39400-A Halogen Leak Detector

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

    2. Object Number: 628247 Size: SH
  2. Remove the discharge hose mounting bolt (2) from the A/C compressor.
  3. Remove the discharge hose (1) from the A/C compressor.
  4. Remove the upper radiator baffle. Refer to Radiator Air Upper Baffle and Deflector Replacement .

    5. Object Number: 363062 Size: SH
  5. Remove the discharge hose nut from the condenser.
  6. Remove the discharge hose from the condenser.
  7. Disconnect the electrical connector from the A/C recirculation switch.
  8. Remove the discharge hose from the vehicle.
  9. Discard all of the used sealing washers. Cap the system openings.

Installation Procedure

    Object Number: 628247 Size: SH
  1. Install the discharge hose (1) to the vehicle.
  2. Connect the electrical connector to the A/C recirculation switch.

    3. Object Number: 363062 Size: SH
  3. Install the discharge hose to the condenser using new sealing washers. Refer to Sealing Washer Replacement .

    4. 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.

  4. Install the discharge hose nut to the condenser.

    5. Tighten
    Tighten the nut to 16 N·m (12 lb ft).

  5. Install the upper air baffle. Refer to Radiator Air Upper Baffle and Deflector Replacement .

    6. Object Number: 628247 Size: SH
  6. Install the discharge hose (1) to the A/C compressor using new sealing washers. Refer to Sealing Washer Replacement .
  7. Install the discharge hose mounting bolt.

    8. Tighten
    Tighten the bolt to 16 N·m (12 lb ft).

  8. Evacuate and recharge the A/C system. Refer to Refrigerant Recovery and Recharging .
  9. Leak test the fittings of the component using the J 39400-A .

Discharge Hose Replacement HP2


Object Number: 1971697 Size: MF

Callout

Component Name

Danger: Always perform the High Voltage Disabling procedure prior to servicing any High Voltage component or connection. Personal Protection Equipment (PPE) and proper procedures must be followed.

The High Voltage Disabling procedure will perform the following tasks:

   • Identify how to disable high voltage.
   • Identify how to test for the presence of high voltage.
   • Identify condition under which high voltage is always present and personal protection equipment (PPE) and proper procedures must be followed.
Failure to follow the procedures exactly as written may result in serious injury or death.

Preliminary Procedures

  1. Disable the hybrid high voltage system. Refer to High Voltage Disabling .
  2. Recover the refrigerant. Refer to Refrigerant Recovery and Recharging and High Voltage Enabling .
  3. Remove the air cleaner. Refer to Air Cleaner Assembly Replacement .
  4. Remove air cleaner resonator outlet duct. Refer to Air Cleaner Resonator Outlet Duct Replacement .
  5. Remove the radiator air upper baffle. Refer to Radiator Air Upper Baffle and Deflector Replacement .
  6. Remove the radiator side shield.
  7. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
  8. Remove the front wheelhouse liner right side. Refer to Front Wheelhouse Liner Replacement - Right Side

1

Discharge Hose Nut

Notice: Refer to Fastener Notice in the Preface section.

Tighten
16 N·m (12 lb ft)

2

Discharge Hose Bolt

Tighten
16 N·m (12 lb ft)

3

Discharge Hose

Procedure

  1. Remove and discard sealing washer. Refer to Sealing Washer Replacement .
  2. Disconnect the electrical connector.
  3. Enable the hybrid high voltage system. Refer to High Voltage Enabling .