GM Service Manual Online
For 1990-2009 cars only

Heater Outlet Hose Replacement LS4

Tools Required

J 38185 Hose Clamp Pliers

Removal Procedure

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

  2. Object Number: 1699794  Size: SH
  3. Use J 38185 to reposition the heater outlet hose clamp to the heater pipe.
  4. Remove the heater outlet hose (2) from the heater pipe.

  5. Object Number: 1699795  Size: SH
  6. Use J 38185 to reposition the heater outlet hose to the heater core clamp.
  7. Remove the heater outlet hose (2) from the heater core.

Installation Procedure


    Object Number: 1699795  Size: SH
  1. Connect heater outlet hose (2) to the heater core.
  2. Use J 38185 to reposition the heater outlet hose to heater core clamp.

  3. Object Number: 1699794  Size: SH
  4. Install the heater outlet hose (2) to the heater pipe.
  5. Use J 38185 to reposition the heater outlet hose to the heater pipe clamp.
  6. Fill the cooling system. Refer to Cooling System Draining and Filling .

Heater Outlet Hose Replacement LZE, LZ4, LZG

Tools Required

J 38185 Hose Clamp Pliers

Removal Procedure

  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 outlet hose clamp at the heater core using the J 38185 .
  4. Reposition the heater outlet hose clamp at the engine using the J 38185 .

  5. Object Number: 1203445  Size: SH
  6. Remove the heater outlet hose from the heater core.
  7. Remove the heater outlet hose from the engine.
  8. Remove both heater outlet hose clamps from the heater outlet hose.

Installation Procedure

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

  2. Object Number: 1203445  Size: SH
  3. Install the heater outlet hose to the engine.
  4. Install the heater outlet hose to the heater core.
  5. Reposition the heater outlet hose clamp at the engine using the J 38185 .
  6. Reposition the heater outlet hose clamp at the heater core using the J 38185 .
  7. Install the surge tank to the surge tank bracket.
  8. Fill the coolant. Refer to Cooling System Draining and Filling .