Heater Inlet Hose Replacement LS4

Tools Required

J 38185 Hose Clamp Pliers

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



2. Use J 38185 to reposition the heater inlet hose clamp at the heater pipe.

Important: Cap or plug the cooling components to prevent system contamination.

3. Remove the heater inlet hose (1) from the heater pipe.



4. Use J 38185 to reposition the heater inlet hose clamp at the heater core.
5. Remove the heater inlet hose (1) from the heater core.

1. Connect heater inlet hose (1) to the heater core.
2. Use J 38185 to reposition the heater inlet hose to the heater core clamp.



3. Install the heater inlet hose (1) to the heater pipe.
4. Use J 38185 to reposition the heater inlet hose to the heater pipe clamp.
5. Fill the cooling system. Refer to Cooling System Draining and Filling .

Heater Inlet Hose Replacement RPOs LZE, LZ4, LZ9

Tools Required

J 38185 Hose Clamp Pliers

1. Drain the coolant. Refer to Cooling System Draining and Filling .
2. Remove the surge tank from the surge tank bracket.
3. Reposition the heater inlet hose clamp at the heater core using the J 38185 .
4. Reposition the heater inlet hose clamp at the engine using the J 38185 .



5. Remove the heater inlet hose from the heater core.
6. Remove the heater inlet hose from the engine.
7. Remove both heater inlet hose clamps from the heater inlet hose.

1. Install both heater inlet hose clamps to the heater inlet hose.



2. Install the heater inlet hose to the engine.
3. Install the heater inlet hose to the heater core.
4. Reposition the heater inlet hose clamp at the engine using the J 38185 .
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 .