GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 2004 🢒 GTO 🢒 HVAC 🢒 Heating, Ventilation and Air Conditioning 🢒 Heater Pipes Replacement

Removal Procedure

    Object Number: 1377118 Size: SH
  1. Remove the heater core from the HVAC module. Refer to Heater Core Replacement .
  2. Remove the heater pipe retaining screws (1).
  3. Remove the heater pipe retaining clamps (6).
  4. Remove the heater pipes (3) from the heater core (4).
  5. Remove and discard the O-rings (2).

Installation Procedure

    Object Number: 1377118 Size: SH
  1. Install new O-rings (2) on the heater pipes (3).
  2. Install the heater pipes to the heater core (4).

    3. 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. Secure the heater pipes with the retaining clamps (6) and screws (1).

    4. Tighten
    Tighten the screws to 4 N·m (35 lb in).

  4. Install the heater core to the HVAC module. Refer to Heater Core Replacement .