2012 Chevrolet Avalanche Owner's Manual - Page 57

Keys, Doors, and Windows If the vehicle has a RVC, the O button for turning the automatic dimming rearview mirror feature on or off will not be available. Vehicles with OnStar have three additional control buttons located at the bottom of the mirror. See a dealer for more information about OnStar and how to subscribe to it. See OnStar Overview on page 14‑1. 2-23 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. Cleaning the Mirror Do not spray glass cleaner directly on the mirror. Use a soft towel dampened with water. 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).