GM Service Manual Online
For 1990-2009 cars only

Heater Outlet Hose Replacement L61

Removal Procedure


    Object Number: 1644878  Size: SH
  1. Drain the engine coolant. Refer to Cooling System Draining and Filling .
  2. Remove the heater outlet hose clamp from the heater core.
  3. Remove the heater outlet hose (1) from the heater core.

  4. Object Number: 1644848  Size: SH
  5. Remove the heater outlet hose clamp from the engine.
  6. Remove the heater outlet hose (1) from the engine.

Installation Procedure


    Object Number: 1644848  Size: SH
  1. Install the heater outlet hose (1) to the engine port.
  2. Install the heater outlet hose clamp to the engine port.

  3. Object Number: 1644878  Size: SH
  4. Install the heater outlet hose (1) to the heater core.
  5. Install the heater outlet hose clamp to the heater core.
  6. Fill the engine coolant. Refer to Cooling System Draining and Filling .

Heater Outlet Hose Replacement L66 at Heater Core

Removal Procedure


    Object Number: 1252528  Size: SH
  1. Drain the engine coolant. Refer to Cooling System Draining and Filling .
  2. Remove the air cleaner outlet duct from the vehicle. Refer to Air Cleaner Resonator Outlet Duct Replacement .
  3. Remove the heater outlet hose clamp from the heater core.
  4. Remove the heater outlet hose from the heater core.

  5. Object Number: 1644896  Size: SH
  6. Remove the heater outlet hose clamp from the "T" fitting.
  7. Remove the heater outlet hose (1) from the "T" fitting.

  8. Object Number: 931349  Size: SH
  9. Remove the heater outlet hose clamp from the surge tank.
  10. Remove the heater outlet hose from the surge tank.

Installation Procedure


    Object Number: 931349  Size: SH
  1. Install the heater outlet hose to the surge tank.
  2. Install the heater outlet hose clamp to the surge tank.

  3. Object Number: 1644896  Size: SH
  4. Install the heater outlet hose (1) to the "T" fitting.
  5. Install the heater outlet hose clamp to the "T" fitting.

  6. Object Number: 1252528  Size: SH
  7. Install the heater outlet hose to the heater core.
  8. Install the heater outlet hose clamp to the heater core.
  9. Install the air cleaner outlet duct to the vehicle. Refer to Air Cleaner Resonator Outlet Duct Replacement .
  10. Fill the engine coolant. Refer to Cooling System Draining and Filling .

Heater Outlet Hose Replacement L66 at Engine

Removal Procedure


    Object Number: 1644896  Size: SH
  1. Drain the engine coolant. Refer to Cooling System Draining and Filling .
  2. Remove the air cleaner outlet duct from the vehicle. Refer to Air Cleaner Resonator Outlet Duct Replacement .
  3. Remove the heater outlet hose clamp from the "T" fitting.
  4. Remove the heater outlet hose (1) from the "T" fitting.

  5. Object Number: 1644898  Size: SH
  6. Remove the heater outlet hose clamp from the engine.
  7. Remove the heater outlet hose (1) from the engine.

Installation Procedure


    Object Number: 1644898  Size: SH
  1. Install the heater outlet hose (1) to the engine.
  2. Install the heater outlet hose clamp to the engine.

  3. Object Number: 1644896  Size: SH
  4. Install the heater outlet hose (1) to the "T" fitting.
  5. Install the heater outlet hose clamp to the "T" fitting.
  6. Install the air cleaner outlet duct to the vehicle. Refer to Air Cleaner Resonator Outlet Duct Replacement .
  7. Fill the engine coolant. Refer to Cooling System Draining and Filling .