Buick LaCrosse: Windows - Windows - Keys, Doors, and Windows - Buick LaCrosse Owners ManualBuick LaCrosse: Windows

WARNING!
Leaving children, helpless adults, or pets in a vehicle with the windows closed is dangerous.
They can be overcome by the extreme heat and suffer permanent injuries or even death from heat stroke. Never leave a child, a helpless adult, or a pet alone in a vehicle, especially with the windows closed in warm or hot weather.

The vehicle aerodynamics are

The vehicle aerodynamics are designed to improve fuel economy performance. This may result in a pulsing sound when a window is partially open. To reduce the sound, open another window or the sunroof (if equipped).

    Windows
    ...

    Power Windows
    Power Windows Press the switch to lower the window. Pull the switch up to raise it. The switches work when the ignition is in ON/RUN or ACC/ACCESSORY, or in Retained Accessory Power (RAP). ...

    See also:

    Engine low oil level warning light
    The engine low oil level warning light illuminates when the ignition switch is turned to the “ON” position and turns off after approximately 2 seconds. This light also illuminates when the en ...

    NISSAN dealer.
    However, now and then you may notice light spark knock for a short time while accelerating or driving up hills. This is not a cause for concern, because you get the greatest fuel benefit when ther ...

    Head Restraints
    The vehicle's front seats have adjustable head restraints in the outboard seating positions. The vehicle's rear seats have adjustable head restraints in the outboard seating positions. WARNING W ...