Cadillac 2011 DTS Owner's Manual page 120

Windows with the express feature allow the windows to
be raised and lowered all the way without holding the
switch.
Press or pull the switch fully and release it to activate
the express feature.
The express mode can be canceled at any time by
briefly pressing or pulling the switch.
If any object is in the path of the window when the
express up is active, the window will stop at the
obstruction and auto reverse to a preset factory
position. Weather conditions such as severe icing
may also cause the window to auto reverse. The
window will return to normal operation once the
obstruction or condition is removed.
3-16
If express override is activated, the window will
not reverse automatically. You or others could be
injured and the window could be damaged. Before
you use express override, make sure that all
people and obstructions are clear of the
window path.
In an emergency, the anti pinch feature can be
overridden in a supervised mode. Hold the window
switch all the way up to the second position. The
window will rise for as long as the switch is held.
Once the switch is released, the express mode is
re activated.
In this mode, the window can still close on an object in
its path. Use care when using the override mode.