2008 Chevrolet Impala Owner's Manual - Page 114

OnStar Steering Wheel Controls Your vehicle may have a Talk/Mute button that can be used to interact with OnStar Hands-Free Calling. See Audio Steering Wheel Controls on page 3-86 for more information. On some vehicles, you may have to hold the button for a few seconds and give the command "ONSTAR" in order to activate the OnStar Hands-Free Calling feature. On some vehicles, the mute button can be used to dial numbers into voicemail systems, or to dial phone extensions. See the OnStar Owner's Guide for more information. The vehicle information usually includes your GPS location and, in the event of a crash, additional information regarding the accident that your vehicle has been involved in (e.g. the direction from which your vehicle was hit). When you use the Virtual Advisor feature of OnStar Hands-Free Calling, your vehicle also sends OnStar your GPS location so that we can provide you with location-based services. OnStar service cannot work unless your vehicle is in a place where OnStar has an agreement with a wireless service provider for service in that area. OnStar service also cannot work unless you are in a place where the wireless service provider OnStar has hired for that area has coverage, network capacity and reception when the service is needed, and technology that is compatible with the OnStar service. Not all services are available everywhere, particularly in remote or enclosed areas, or at all times. OnStar service that involves location information about your vehicle cannot work unless GPS satellite signals are unobstructed and available in that place as well. How OnStar Service Works In order to provide you with OnStar services, your vehicle's OnStar system has the capability of recording and transmitting vehicle information. This information is automatically sent to an OnStar Call Center at the time of an OnStar button press, Emergency button press or if your airbags or AACN system deploys. 2-40