Heater Inlet Hose Replacement 4.3L

Tools Required

J 38185 Hose Clamp Pliers

1. Drain the engine coolant. Refer to Cooling System Draining and Filling in Engine Cooling.



2. Release the heater inlet hose clamp using the J 38185 at the heater core.
3. Remove the heater inlet hose from the heater core.



4. Release the heater inlet hose clamp using the J 38185 at the intake manifold fitting.
5. Remove the heater inlet hose from the intake manifold fitting.



6. Open the heater inlet hose retaining clip above the right side valve cover. Use a flat bladed tool to open the clip from the bottom.
7. Remove the heater inlet hose from the vehicle.

1. Apply lubricant, GM P/N 9985662, to each end of the heater inlet hose.

Important: When installing new heater inlet hose, place the clamp on the hose before installing the hose to the vehicle.

2. Install the heater inlet hose to the vehicle.
3. Install the heater inlet hose to the intake manifold fitting.
4. Install the heater inlet hose clamp using the J 38185 at the intake manifold fitting.



5. Install the heater inlet hose to the heater core.
6. Install the heater inlet hose clamp using the J 38185 at the heater core.



7. Place the heater inlet hose in the retaining clip above the right side valve cover.
8. Close the retaining clip. Ensure that the clip locks.
9. Fill the engine cooling system. Refer to Cooling System Draining and Filling in Engine Cooling.