GM Service Manual Online
For 1990-2009 cars only

Tools Required

J 39400-A Halogen Leak Detector

Removal Procedure

  1. Remove the HVAC Module-Auxiliary. Refer to Auxiliary HVAC Module Replacement .
  2. Remove the screws from the heater core cover-auxiliary.
  3. Remove the heater core cover-auxiliary.

  4. Object Number: 816352  Size: SH
  5. Remove the HVAC pass thru seal (3) from the HVAC module-auxiliary (1).

Installation Procedure


    Object Number: 816352  Size: SH
  1. Install the HVAC pass thru seal (3) to the HVAC module-auxiliary (1).
  2. Install the heater core cover-auxiliary.
  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.

  4. Install the screws to the heater core cover-auxiliary.
  5. Tighten
    Tighten the screws to 1.9 N·m (18 lb in).

  6. Install the HVAC Module-Auxiliary. Refer to Auxiliary HVAC Module Replacement .