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).

See also:

Problems with Route Guidance
Inappropriate route guidance may occur under one or more of the following conditions: You have not turned onto the road indicated. Route guidance may not be available when using automatic rerout ...

Reactivation for Subsequent Owners
Push and follow the prompts to speak to an Advisor as soon as possible after acquiring the vehicle. The Advisor will update vehicle records and will explain the OnStar service offers and opt ...

Odometer
The vehicle's odometer works together with the Driver Information Center (DIC). The Trip odometer can be set. See “Trip Odometer” under Driver Information Center (DIC)   for more inf ...