| Subject: | Revised Defroster Actuator Replacement Procedure | 
| Models: | 2003 Chevrolet Express | 
 
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
- Remove the I/P upper trim pad. Refer to  Trim Pad Replacement -
Instrument Panel (I/P) Upper in Instrument Panel, Gages, and Console.
 
- Disconnect the vacuum hose (1) from the defrost
actuator (2).
 
- Depress the clip and remove the defrost actuator (2) from the heater
assembly.
 
Installation Procedure
- Install the defrost actuator (2)  to the heater
assembly.
 
- Connect the vacuum hose (1) to the defrost actuator (2).
 
- Install the I/P upper trim pad. Refer to  Trim Pad Replacement -
Instrument Panel (I/P) Upper in Instrument Panel, Gages, and Console.