The window switches are contained within the driver door switch assembly (DDSA). The DDSA internally supplies power and ground to the contacts of each of the integral window switches. When one of the switches is operated, the switch contacts close, providing the DDSA with a specific window switch signal. The DDSA processes this signal, assigns a digital message to it, and sends the message to the appropriate driver door module (DDM), passenger front door module (PDM), left rear door module (LRDM), or right rear door module (RRDM), via the GMLAN serial data circuit. The door module, upon receiving the message, examines other relevant information available on the GMLAN serial data circuit in order to determine if conditions are correct for window operation to occur. If conditions are correct, the door module commands the associated window motor and circuits in order to move the window. For more detailed information concerning power window operation refer to Power Windows Description and Operation .

This diagnostic procedure supports the following DTCs:

This vehicle has DTCs which include DTC symptoms. For more information on DTC symptoms, refer to DTC Symptom Description .

The DDSA detects that one of the window switches is closed for more than 15 continuous seconds.

The action taken depends on which switch contacts are closed:

Thoroughly inspect the wiring and connectors. An incomplete inspection of the wiring and connectors may result in misdiagnosis causing part replacement with the reappearance of the malfunction. If an intermittent malfunction exists, refer to Testing for Intermittent Conditions and Poor Connections .