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For 1990-2009 cars only

SMU - Revised Defroster Actuator Replacement Procedure

Subject:Revised Defroster Actuator Replacement Procedure

Models:2003 Chevrolet Express
2003 GMC Savana



This bulletin is being issued to revise the Defroster Actuator Replacement procedure in the HVAC Systems with A/C - Manual sub-section of the Service Manual. Please replace the current information in the Service Manual with the following information.

The following information has been updated within SI. If you are using a paper version of this Service Manual, please make a reference to this bulletin on the affected page.

Removal Procedure

  1. Remove the I/P upper trim pad. Refer to Trim Pad Replacement - Instrument Panel (I/P) Upper in Instrument Panel, Gages, and Console.

  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 Trim Pad Replacement - Instrument Panel (I/P) Upper in Instrument Panel, Gages, and Console.