Lockout Switch Feature
WARNING: This page is about a different car, the 2008 Buick LaCrosse and 2008 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
The driver window switch contains a rear window lockout switch which disconnects the battery positive voltage supply to the rear passenger door window switches, disabling them. The front passenger door window switch cannot be locked out.