2005 Cadillac XLR Owner's Manual - Page 237

This system may not be available/or interferences may occur if any of the following are true: Vehicle Positioning At times, the position of the vehicle on the map may be inaccurate due to one or more of the following reasons: • Signal are obstructed by tall buildings, large trucks, or a tunnels. • Satellites are being repaired or improved. • Objects are located on the rear shelf. • 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. If you are experiencing a problem, see Vehicle Positioning on page 4-43 or Problems with Route Guidance on page 4-44 for more information. • The road system has changed. • The vehicle is traveling on slippery road surfaces such as sand, gravel, and/or snow. • The vehicle is being driven on winding roads. • The vehicle is being driven on a long straight road. • The vehicle is approaching a tall building or a large vehicle. • The surface streets run parallel to a freeway. • The vehicle has just been transferred by a vehicle carrier or a ferry. • The current position calibration is set incorrectly. • The vehicle is being driven at high speeds. 4-43