GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

  1. Remove instrument panel compartment assembly. Refer to Instrument Panel Compartment Replacement.

  2. Object Number: 2027818  Size: SH
  3. Remove instrument panel wiring harness (2) from instrument panel tie bar (1).
  4. Disconnect electrical connectors.


    Object Number: 2027821  Size: SH
  5. Remove instrument panel tie bar (2).
  6. • Remove 4 instrument panel tie bar bolts (3, 4).
    • Remove 2 instrument panel tie bar nuts (1).

    Object Number: 2027962  Size: SH
  7. Remove mode control cam (1).

  8. Object Number: 2028007  Size: SH
  9. Remove 2 mode valve lever (1).

Installation Procedure


    Object Number: 2027978  Size: SH

    Note: The mode valve levers have to be fitted to the according mode valve gears in figured position. The ventilation dampers have to be in middle position.

  1. Install 2 mode valve lever (1).

  2. Object Number: 2027962  Size: SH

    Note: The mode control cam can only be fitted in one position.

  3. Install mode control cam (1).
  4. Caution: Refer to Fastener Caution in the Preface section.


    Object Number: 2027821  Size: SH
  5. Install instrument panel tie bar (2).
  6. • Install 4 instrument panel tie bar bolts (3, 4) and tighten to  XXX N·m (XXX lb in).
    • Install 2 instrument panel tie bar nuts (1) and tighten to  XXX N·m (XXX lb in).

    Object Number: 2027818  Size: SH
  7. Install instrument panel wiring harness (2) from instrument panel tie bar (1).
  8. Connect electrical connectors.

  9. Install instrument panel compartment assembly. Refer to Instrument Panel Compartment Replacement.