GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2005 🢒 Classic 🢒 HVAC 🢒 HVAC Systems - Manual 🢒 Defroster Valve Actuator Replacement

Removal Procedure

    Object Number: 604753 Size: SH
  1. Remove the I/P carrier. Refer to Instrument Panel Carrier Replacement in Instrument Panel, Gages, and Console.
  2. Remove the blue vacuum hose (1) and the green vacuum hose (2) from the defroster actuator.

    3. Note the location of the hoses.


    Object Number: 604614 Size: SH
  3. Remove the defroster actuator.
    4. 3.1. Lift the actuator lock tab.
    3.2. Slide off the actuator.

    Object Number: 604733 Size: SH
  4. Remove the actuator linkage from the defroster door.

    5. Squeeze the tabs on the door in order to remove the linkage.

Installation Procedure

    Object Number: 604733 Size: SH
  1. Install the actuator linkage to the defroster door.

    2. Object Number: 604614 Size: SH
  2. Slide the defroster actuator on to the mounting bracket until the tab locks.
  3. Connect the blue vacuum hose (1) and the green vacuum hose (2) to the defroster actuator.
  4. Install the I/P carrier. Refer to Instrument Panel Carrier Replacement in Instrument Panel, Gages, and Console.