GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 1998 🢒 Tracker - 4WD 🢒 Restraints 🢒 SIR 🢒 Control Assembly Replacement

Removal Procedure

    Object Number: 345579 Size: SH
  1. Gently pull the 4 knobs from the heater control unit.
  2. Remove the heater control unit face plate (3) from the center trim bezel by pulling the face plate straight out.
  3. Remove the illumination lamp bulb socket (1) from the heater control unit face plate.

    4. Object Number: 345576 Size: SH
  4. Remove the ash tray.
  5. Remove the 4 screws (1) and the center trim bezel.

    6. Object Number: 345806 Size: MH

    Important: Note the routing of the cables in order to facilitate installation.

  6. Remove the temperature control cable  (5) at the heater case.
  7. Remove the mode control cable (4) at the heater case.
  8. Remove the fresh/recirc control cable at the blower case.
  9. Disconnect the blower switch electrical connector.
  10. Remove the heater control unit from the instrument panel.
  11. Remove the blower switch from the heater control unit, as needed.

Installation Procedure
  1. Install the blower switch to the heater control unit, as needed.
  2. Install the heater control unit to the instrument panel. Route the cables as previously noted.
  3. Connect the blower switch electrical connector.
  4. Install the fresh/recirc control cable (2) to the blower case.

    5. Object Number: 345806 Size: MH
  5. Install the mode control (4) cable to the heater case.
  6. Install the temperature control cable (5) to the heater case.

    7. Object Number: 345576 Size: SH
  7. Install the center trim bezel and secure with the 4 screws (1).
  8. Install the ash tray.

    9. Object Number: 345579 Size: SH
  9. Install the illumination lamp bulb socket (1) to the heater control unit face plate.
  10. Install the heater control unit face plate to the instrument panel by pushing the face plate until the plate snaps into place.
  11. Install the heater control unit knobs.
  12. Adjust the temperature, mode and fresh/recirc control cables as needed. Refer to the following:
    13. •  Temperature Control Cable Adjustment
    • Mode Control Cable Adjustment
    • Vent Control Cable Adjustment