2014 Chevrolet SS Owner Manual - Page 202

7-66 Infotainment System Map Settings: Press to enter the submenu to change Automatic Zoom, enable Speed Limit display on map, and change Map Display settings. . Global Positioning System (GPS) The position of the vehicle is determined by using satellite signals, various vehicle signals, and map data. At times, other interference such as the satellite condition, road configuration, condition of the vehicle, and/or other circumstances can affect the navigation system's ability to determine the accurate position of the vehicle. The GPS shows the current position of the vehicle using signals sent by the GPS Satellites. When the vehicle is not receiving signals from the satellites, a symbol appears on the map screen. See Navigation Symbols on page 7-46. This system might not be available or interference can occur if any of the following are true: . . Satellites are being repaired or improved. Map Display: Press to change the screen background. ‐ The Automatic setting adjusts the screen background automatically depending on the exterior lighting conditions. ‐ The Day setting brightens the map background. ‐ The Night setting darkens the map background. For more information if the GPS is not functioning properly, see Problems with Route Guidance on page 7-67 and If the System Needs Service on page 7-68. Vehicle Positioning At times, the position of the vehicle on the map could be inaccurate due to one or more of the following reasons: . . The road system has changed. The vehicle is driving on slippery road surfaces such as sand, gravel, or snow. The vehicle is traveling on winding roads or long straight roads. The vehicle is approaching a tall building or a large vehicle. The surface streets run parallel to a freeway. To change the overall brightness setting for the display, use the vehicle interior lighting instrument panel illumination control. . . . Signals are obstructed by tall buildings, trees, large trucks, or a tunnel.