2009 Cadillac XLR-V Owner's Manual - Page 264

Vehicle Positioning At times, the position of the vehicle on the map may be inaccurate due to one or more of the following reasons: • The vehicle is entering and/or exiting a parking lot, garage, or a lot with a roof. • The road system has changed. • The vehicle is driving on slippery road surfaces such as in sand, gravel, and/or snow. • The vehicle is traveling on winding roads. • The vehicle is 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 GPS signal is not received. A roof carrier is installed on the vehicle. The vehicle is being driven with tire chains. The tires are replaced. The tire pressure for the tires is incorrect. The tires are worn. The first time the map DVD is inserted. The battery is disconnected for several days. The vehicle is driving in heavy traffic where driving is at low speeds, and the vehicle is stopped and started repeatedly. • The current position calibration is set incorrectly. • The vehicle is traveling at high speed. • The vehicle changes directions more than once, or when the vehicle is turning on a turn table in a parking lot. If problems are experienced with the navigation system, see "Adjust Vehicle Position" under Setup Menu on page 4-12 to calibrate the system. 4-50