GM Service Manual Online
For 1990-2009 cars only

Heater Inlet Pipe Replacement 3.4L

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-3.4L.

  3. Object Number: 466875  Size: SH
  4. UseJ 38185 in order to position aside the heater hose inlet clamp.
  5. Disconnect the inlet hose (3) from the heater inlet pipe.

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

Installation Procedure


    Object Number: 190515  Size: SH
  1. Install the heater inlet pipe.
  2. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  3. Install theheater 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 heater inlet pipe.
  6. UseJ 38185 in order to position the heater hose inlet clamp.
  7. Install the air cleaner assembly. Refer to Air Cleaner Assembly Replacement in Engine Controls-3.4L.
  8. Refill the cooling system. Refer to Cooling System Draining and Filling in Engine Cooling.