Cadillac 2006 STS - Manual (Page 82)

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 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 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.
• The vehicle is entering and/or exiting a parking lot,
garage or a lot with a roof.
• The GPS signal is not received.
• A roof carrier is installed on your vehicle.
• The vehicle is equipped with tire chains.
• The tires are replaced.
• The tire pressure for your 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.
If you experience problems with your system, you may
need to calibrate the system. This may be due to
tire pressure differences, or if a spare tire is installed.
To calibrate the system, see Configure Menu on
page 2-57.
2-68