GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2001 🢒 Express 🢒 HVAC 🢒 Heating, Ventilation and Air Conditioning 🢒 Auxiliary Heater Core Replacement

Removal Procedure
  1. Remove the left rear quarter trim panel. Refer to Body Side Rear Trim Panel Replacement in Interior Trim.
  2. Remove the auxiliary heater case from the vehicle. Refer to Heater Case Replacement .

    3. Object Number: 301710 Size: SH
  3. Remove the screws from the bottom of the auxiliary heater case.

    4. Object Number: 301711 Size: SH
  4. Remove the heater core from the case.

Installation Procedure

    Object Number: 301711 Size: SH
  1. Install the heater core to the case.

    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.

  2. Install the screws to the bottom of the auxiliary heater case.

    3. Tighten
    Tighten the screws to 1.9 N·m (17 lb in).

  3. Install the auxiliary heater case to the vehicle. Refer to Heater Case Replacement .
  4. Install the left rear quarter trim panel. Refer to Body Side Rear Trim Panel Replacement in Interior Trim.