GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

  1. Remove the I/P upper trim pad. Refer to Instrument Panel Upper Trim Pad Replacement.

  2. Object Number: 668959  Size: SH
  3. Disconnect the vacuum hose (1) from the defrost actuator (2).
  4. Depress the clip and remove the defrost actuator (2) from the heater assembly.

Installation Procedure


    Object Number: 668959  Size: SH
  1. Install the defrost actuator (2) to the heater assembly.
  2. Connect the vacuum hose (1) to the defrost actuator (2).
  3. Install the I/P upper trim pad. Refer to Instrument Panel Upper Trim Pad Replacement.