GM Service Manual Online
For 1990-2009 cars only

Heater Inlet Hose Replacement L18

Removal Procedure

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

  2. Object Number: 644634  Size: SH
  3. Remove the inlet hose at the fender clip.
  4. Remove the inlet hose clamp (2) from the heater core.
  5. Remove the inlet hose from the heater core.
  6. Remove the hose clamp (2) at the intake manifold fitting (3).
  7. Remove the inlet hose from the intake manifold fitting.

Installation Procedure


    Object Number: 644634  Size: SH
  1. Install the inlet hose to the intake manifold fitting (3).
  2. Install the inlet hose clamp (2) to the intake manifold fitting.
  3. Install the inlet hose to the heater core.
  4. Install the inlet hose clamp (2) to the heater core.
  5. Install the inlet hose to the fender clip.
  6. Fill the engine coolant. Refer to Cooling System Draining and Filling in Engine Cooling.