2007 Cadillac XLR-V Owner's Manual - Page 281

OnStar® System When using the OnStar® system, the audio system will be muted and the navigation voice prompts will be disabled during the call. The volume of the OnStar® call can be adjusted by using the steering wheel volume controls. See OnStar® System on page 107 for more information. Global Positioning System (GPS) The Navigation System determines the position of your vehicle by using satellite signals, various vehicle signals, and map data. At times, other interferences such as the satellite condition, road configuration, the condition of the vehicle and/or other circumstances can interfere with the Navigation's ability to determine the accurate position of the vehicle. The GPS shows the current position of your vehicle using signals sent by the GPS Satellites of the United States Department of Defense. When your vehicle is not receiving signals from the satellites, a symbol will appear on the map screen. Refer to Symbols on page 275. This system may not be available or interference may occur if the following happens: • Signal obstructions caused by tall buildings, large trucks, tunnels, • objects located on top of the instrument panel, • satellites will not send signals if they are being repaired or improved, • after-market glass tinting has been applied to the vehicle's windows. Notice: Do not apply after-market glass tinting to the vehicle's windows. Glass tinting will interfere with the system's ability to receive GPS signals and cause the system to malfunction. You might have to replace the window to correct the problem. This would not be covered by your warranty. For more information if you are experiencing a problem, see If the System Needs Service on page 283 and Problems with Route Guidance on page 283. 281