Express Down Feature
WARNING: This page is about a different car, the 2006 Buick LaCrosse and 2006 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
The driver window will travel to the fully down position when the driver window switch is pressed past the first DOWN detent. Pressing the switch to the full DOWN position or to the UP position or will cancel the express down feature.