GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 1646777  Size: SH
  1. Remove the HVAC module from the vehicle. Refer to HVAC Module Assembly Replacement .
  2. Remove the heater core cover screws from the HVAC module.
  3. Remove the heater core cover from the HVAC module.

  4. Object Number: 1648497  Size: SH
  5. Remove the heater core from the HVAC module.

Installation Procedure


    Object Number: 1648497  Size: SH
  1. Install the heater core to the HVAC module.

  2. Object Number: 1646777  Size: SH
  3. Install the heater core cover to the HVAC module.
  4. Notice: Refer to Fastener Notice in the Preface section.

  5. Install the heater core cover screws to the HVAC module.
  6. Tighten
    Tighten the screw to 1.5 N·m (13 lb in).

  7. Install the HVAC module to the vehicle. Refer to HVAC Module Assembly Replacement .

Removal Procedure


    Object Number: 1646777  Size: SH
  1. Remove the HVAC module from the vehicle. Refer to HVAC Module Assembly Replacement.
  2. Remove the heater core cover screws from the HVAC module.
  3. Remove the heater core cover from the HVAC module.

  4. Object Number: 1648497  Size: SH
  5. Remove the heater core from the HVAC module.

Installation Procedure


    Object Number: 1648497  Size: SH
  1. Install the heater core to the HVAC module.

  2. Object Number: 1646777  Size: SH
  3. Install the heater core cover to the HVAC module.
  4. Caution: Refer to Fastener Caution in the Preface section.

  5. Install the heater core cover screws to the HVAC module.
  6. Tighten
    Tighten the screw to 1.5 N·m (13 lb in).

  7. Install the HVAC module to the vehicle. Refer to HVAC Module Assembly Replacement.