Power Window System Operation

WARNING: This page is about a different car, the 2017 GMC Acadia Limited, 2017 Chevrolet Traverse, and 2017 Buick Enclave. However, it is still accessible from the selected car via links, so may be relevant.

The driver window switch contains 4 power window switches which are integral components to the driver door lock/window switch. Closing any of the normally open switches provides the driver door lock/window switch with a request for power window operation. The switches for the driver window will have 4 positions up, down, and express up and express down, the passenger window depending upon the option configuration may have 3 or 4 positons for up, down, and express down and possibly express up while the switches for the rear windows have only 2 positions; up and down. Each of these switches and their positions is a direct input into the driver door lock/window switch. Upon receiving a request for power window operation, the driver door lock/window switch, transmits a serial data message indicating the switch and it's changed position.

The 2 rear passenger doors have their own switches. A switch activation alone can control the up and down functions of the rear windows. However the BCM, upon receiving a serial data message from the driver door lock/window switch, will send a signal to the appropriate rear window switch which will command their respective rear window motors.