GM Service Manual Online
For 1990-2009 cars only

Heater Inlet Pipe Replacement 3.1L

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 air cleaner assembly. Refer to Air Cleaner Assembly Replacement in Engine Controls - 3.1L.
  3. Use the J 38185 in order to reposition the heater hose inlet clamp.

  4. Object Number: 466875  Size: SH
  5. Disconnect the inlet hose (3) from the inlet pipe.

  6. Object Number: 190515  Size: SH
  7. Remove the inlet pipe mounting nut.
  8. Remove the inlet pipe.

Installation Procedure


    Object Number: 190515  Size: SH
  1. Install the heater inlet pipe.
  2. Notice: Refer to Fastener Notice in the Preface section.

  3. Install the heater inlet pipe mounting nut.
  4. Tighten
    Tighten the nut to 7 N·m (62 lb in).


    Object Number: 466875  Size: SH
  5. Connect the inlet hose (3) to the inlet pipe.
  6. Use the J 38185 in order to reposition the heater hose inlet clamp.
  7. Install the air cleaner assembly. Refer to Air Cleaner Assembly Replacement in Engine Controls - 3.1L.
  8. Refill the cooling system. Refer to Cooling System Draining and Filling in Engine Cooling.