Rear Power Window Lockout Operation
WARNING: This page is about a different car, the 2010 Saturn Outlook, 2010 GMC Acadia, 2010 Chevrolet Traverse, and 2010 Buick Enclave. However, it is still accessible from the selected car via links, so may be relevant.
The rear window lockout function is operated from the driver master control, when the rear window lockout switched is pressed, an indicator light will illuminate and a GMLAN message will be sent to the BCM via the DDM. When the BCM receives a lockout command, the rear door power window switches are disabled. Once activated, the rear power window switches will be disabled until the ignition switch is cycled or the switch is pressed again to enable the rear window switches.