Heater Outlet Hose Replacement Utility LR4, LM7, LQ4

1. Drain the cooling system. Refer to Cooling System Draining and Filling in Engine Cooling.
2. Remove the air intake tube.
3. Remove the heater and surge tank hoses from the mounting clip.



4. Squeeze the plastic retainer release tabs.



5. Pull the connection apart.



6. Remove the outlet heater hose from the water pump.
7. Reposition the outlet heater hose clamp at the surge tank.
8. Remove the outlet heater hose from the surge tank.



9. Remove the outlet heater hose.

1. Install the outlet heater hose.



2. Install the outlet heater hose to the water pump.
3. Install the outlet heater hose to the surge tank.
4. Install the outlet heater hose clamp to the surge tank.



5. Connect the heater and surge tank hoses to the heater core.

Important: Firmly push the quick connect onto the heater core hose until you hear an audible click.

6. Pull the heater outlet hose to ensure the connection.
7. Install the heater and surge tank hoses to the mounting clip.
8. Install the air intake tube.
9. Fill the cooling system. Refer to Cooling System Draining and Filling in Engine Cooling.

Heater Outlet Hose Replacement Avalanche/Xlt LR4, LM7, LQ4

Tools Required

J 43181 Quick Connect Connector Removal Tool

1. Drain the cooling system. Refer to Cooling System Draining and Filling in Engine Cooling.
2. Remove the air intake tube.
3. Remove the heater and surge tank hose from the mounting clip.



4. Using the J 43181 disconnect the heater hose from the heater core outlet.

4.1.	Install the J 43181 to the heater core pipe.

4.2.	Close the tool around the heater core pipe.

4.3.	Firmly pull the tool into the quick connect end of the heater hose.

4.4.	Firmly grasp the heater hose. Pull the heater hose forward in order to disengage the hose from the heater core.




5. Remove the outlet heater hose from the engine.



6. Remove the outlet heater hose.

1. Install the outlet heater hose.



2. Install the outlet heater hose to the engine.
3. Connect the outlet heater hose to the heater core.

Firmly push the quick connect onto the heater core pipe until you hear an audible click.

4. Install the heater and surge tank hose to the mounting clip.
5. Install the air intake tube.
6. Fill the cooling system. Refer to Cooling System Draining and Filling in Engine Cooling.