GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 1998 🢒 Express 🢒 HVAC 🢒 Heating, Ventilation and Air Conditioning 🢒 Defroster Valve Replacement
  1. Remove the right windshield garnish molding. Refer to Windshield Garnish Molding Replacement in Stationary Windows.

    2. Object Number: 301630 Size: SH
  2. Disconnect the vacuum hose from the valve (1).
  3. Remove the valve by unsnapping the valve from the heater case.

    4. Object Number: 301625 Size: SH
  4. Disconnect the linkage from the valve.

Installation Procedure

    Object Number: 301625 Size: SH
  1. Connect the linkage to the valve.

    2. Object Number: 301630 Size: SH
  2. Install the valve by snapping the valve to the heater case.
  3. Connect the vacuum hose to the valve (1).
  4. Install the right windshield garnish molding. Refer to Windshield Garnish Molding Replacement in Stationary Windows.