GM Service Manual Online
For 1990-2009 cars only

Heater Inlet Hose Replacement LY7


Object Number: 1772682  Size: SF

Callout

Component Name

Preliminary Procedure

Drain the cooling system. Refer to Cooling System Draining and Filling .

1

Heater Inlet Hose Assembly

Tip

  1. Using J 38185 to reposition of the heater inlet hose clamps.
  2. Remove the heater inlet hose from the heater core and engine.

Special Tools

J 38185 Hose Clamp Pliers

Heater Inlet Hose Replacement LAT Pump to Engine


Object Number: 1871128  Size: MF

Callout

Component Name

Preliminary Procedures

Partially drain the cooling system. Refer to Cooling System Draining and Filling .

1

Heater Inlet Hose Clamp (Qty: 2)

2

Heater Inlet Hose

Heater Inlet Hose Replacement LAT Pump to Heater Core


Object Number: 1871132  Size: MF

Callout

Component Name

Preliminary Procedures

Partially drain the cooling system. Refer to Cooling System Draining and Filling .

1

Heater Inlet Hose Clamp (Qty: 2)

2

Heater Inlet Hose

Heater Inlet Hose Replacement LE5

Special Tools

J 38185 Hose Clamp Pliers

Warning: With a pressurized cooling system, the coolant temperature in the radiator can be considerably higher than the boiling point of the solution at atmospheric pressure. Removal of the surge tank cap, while the cooling system is hot and under high pressure, causes the solution to boil instantaneously with explosive force. This will cause the solution to spew out over the engine, the fenders, and the person removing the cap. Serious bodily injury may result.

Removal Procedure

  1. Partially drain the coolant. Refer to Cooling System Draining and Filling.
  2. Remove the surge tank from the surge tank bracket.

  3. Object Number: 872572  Size: SH
  4. Reposition the heater inlet hose clamp at the heater core using the J 38185 .
  5. Remove the heater inlet hose from the heater core.

  6. Object Number: 872574  Size: SH
  7. Reposition the heater inlet hose clamp at the engine using the J 38185 .
  8. Remove the heater inlet hose from the engine.

Installation Procedure


    Object Number: 872574  Size: SH
  1. Install the heater inlet hose to the engine.
  2. Reposition the heater inlet hose clamp at the engine using the J 38185 .

  3. Object Number: 872572  Size: SH
  4. Install the heater inlet hose to the heater core.
  5. Reposition the heater inlet hose clamp at the heater core using the J 38185 .
  6. Install the surge tank to the surge tank bracket.
  7. Fill the coolant. Refer to Cooling System Draining and Filling.