GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2003 🢒 Impala 🢒 HVAC 🢒 Heating, Ventilation and Air Conditioning 🢒 Heater Inlet Hose Replacement

Heater Inlet Hose Replacement 3.4L

Tools Required

J 38185 Hose Clamp Pliers

Removal Procedure
  1. Drain the cooling system. Refer to Cooling System Draining and Filling in Engine Cooling.

    2. Object Number: 466875 Size: SH
  2. UseJ 38185 in order to position aside the heater hose inlet clamp.
  3. Disconnect the heater inlet hose (3) from the inlet pipe.

    4. Object Number: 414213 Size: SH
  4. UseJ 38185 in order to position aside the heater core inlet hose clamp.
  5. Disconnect the heater inlet hose from the heater core.
  6. Remove the heater inlet hose.

Installation Procedure
  1. Install the heater inlet hose.

    2. Object Number: 414213 Size: SH
  2. Connect the heater inlet hose to the heater core.

    3. Important: Position heater core hose clamps in the indicated location.

  3. UseJ 38185 in order to secure the heater core hose inlet clamp.

    4. Object Number: 466875 Size: SH
  4. Connect the heater inlet hose (3) to the inlet pipe.
  5. UseJ 38185 in order to secure the heater hose inlet clamp.
  6. Refill the cooling system. Refer to Cooling System Draining and Filling in Engine Cooling.

Heater Inlet Hose Replacement 3.8L

Tools Required

J 38185 Hose Clamp Pliers

Removal Procedure
  1. Drain the cooling system. Refer to Cooling System Draining and Filling in Engine Cooling.
  2. Remove the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement in Engine Mechanical-3.8L.
  3. UseJ 38185 in order to position aside the heater hose inlet clamp at the pipe adapter.
  4. Disconnect the heater inlet hose from the pipe adapter.

    5. Object Number: 1204093 Size: SH
  5. UseJ 38185 in order to position aside the heater core inlet hose clamp.
  6. Disconnect the heater inlet hose from the heater core.
  7. Remove the heater inlet hose from the support bracket.

Installation Procedure

    Object Number: 1204093 Size: SH
  1. Install the heater inlet hose to the support bracket.
  2. Connect the heater inlet hose to the heater core.
  3. Use J 38185 in order to secure the heater core hose inlet clamp.
  4. Connect the heater inlet hose to the pipe adapter.
  5. UseJ 38185 in order to secure the heater hose inlet clamp.
  6. Install the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement in Engine Mechanical-3.8L.
  7. Refill the cooling system. Refer to Cooling System Draining and Filling in Engine Cooling.