GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 1644813  Size: SH
  1. Remove the instrument panel upper trim panel. Refer to Instrument Panel Upper Trim Panel Replacement .
  2. Remove the windshield defrost duct nuts from the HVAC module.
  3. Remove the windshield defrost duct from the HVAC module.

Installation Procedure


    Object Number: 1644813  Size: SH
  1. Inspect the windshield defrost duct seals. If damaged, replace using Kent Industries adhesive back foam tape P/N 46485 or equivalent.
  2. Install the windshield defrost duct to the HVAC module.
  3. Notice: Refer to Fastener Notice in the Preface section.

  4. Install the windshield defrost duct nuts to the HVAC module.
  5. Tighten
    Tighten the nuts to 2.5 N·m (22 lb in).

  6. Install the instrument panel upper trim panel. Refer to Instrument Panel Upper Trim Panel Replacement .