GM Service Manual Online
For 1990-2009 cars only

Radiator Vent Inlet Hose Replacement 4.8 L, 5.3 L, and 6.0 L Engines

Removal Procedure


    Object Number: 659465  Size: SH
  1. Drain the cooling system. Refer to Cooling System Draining and Filling .
  2. If necessary, remove the engine sight shield. Refer to Upper Intake Manifold Sight Shield Replacement in Engine Mechanical - 4.8 L, 5.3 L, and 6.0 L.
  3. Remove the radiator vent inlet hose from the radiator inlet hose clips.
  4. Reposition the vent inlet hose clamp at the throttle body.
  5. Remove the vent inlet hose from the throttle body.

  6. Object Number: 659469  Size: SH
  7. Remove the vent inlet hose clip at the fan shroud.
  8. Reposition the vent inlet hose clamp at the radiator.
  9. If equipped with regular production option (RPO) C36 (auxiliary heater), remove the vent inlet hose from the radiator.

  10. Object Number: 721977  Size: SH
  11. If equipped without RPO C36 (auxiliary heater), remove the vent inlet hose from the radiator.

Installation Procedure


    Object Number: 721977  Size: SH
  1. If equipped without RPO C36 (auxiliary heater), install the vent inlet hose to the radiator.

  2. Object Number: 659469  Size: SH
  3. If equipped with RPO C36 (auxiliary heater), install the vent inlet hose to the radiator.
  4. Position the vent inlet hose clamp at the radiator.
  5. Install the vent inlet hose clip at the fan shroud.

  6. Object Number: 659465  Size: SH
  7. Install the vent inlet hose to the throttle body.
  8. Position the vent inlet hose clamp at the throttle body.
  9. Install the radiator vent inlet hose to the radiator inlet hose clips.
  10. If necessary, install the engine sight shield. Refer to Upper Intake Manifold Sight Shield Replacement in Engine Mechanical - 4.8 L, 5.3 L, and 6.0 L.
  11. Refill the cooling system. Refer to Cooling System Draining and Filling .