GM Service Manual Online
For 1990-2009 cars only

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. Object Number: 422254  Size: SH
  4. Position the J 38185 in order to remove the heater hose clamps.
  5. Remove the heater hoses from the heater core.

  6. Object Number: 420668  Size: SH
  7. Remove the heater hoses from the heater pipe adapters.

Installation Procedure


    Object Number: 420668  Size: SH
  1. Install the heater hoses on to the heater pipe adapters.
  2. Install the heater hoses on to the heater core.

  3. Object Number: 422254  Size: SH
  4. Position the J 38185 in order to install the heater hose clamps.
  5. Install the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement in Engine Mechanical.
  6. Fill the cooling system. Refer to Cooling System Draining and Filling in Engine Cooling.