Cadillac 2008 Escalade Navigation System Owner's Manual

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Cadillac 2008 Escalade Navigation System Owner's Manual Manual pdf 52 page image

Global Positioning System (GPS)The navigation system determines the position of yourvehicle by using satellite signals, various vehicle signals,and map data.At times, other interferences such as the satellitecondition, road configuration, the condition of the vehicleand/or other circumstances can interfere with thenavigation system’s ability to determine the accurateposition of the vehicle.The GPS shows the current position of your vehicleusing signals sent by the GPS Satellites of the UnitedStates Department of Defense. When your vehicle is notreceiving signals from the satellites, a symbol willappear on the map screen. Refer to Symbols onpage 2-7.This system may not be available or interferences mayoccur if any of the following are true:• Signals are obstructed by tall buildings, trees, largetrucks, or a tunnel.• Objects are located on the rear shelf.• Satellites are being repaired or improved.• After-market glass tinting has been applied to thevehicle’s rear windshield.Notice: Do not apply after-market glass tinting tothe vehicle’s windows. Glass tinting will interferewith the system’s ability to receive GPS signals andcause the system to malfunction. You might haveto 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 2-40 andProblems with Route Guidance on page 2-39.Vehicle PositioningAt times, the position of the vehicle on the map may beinaccurate due to one or more of the followingreasons:• The road system has changed.• The vehicle is driving on slippery road surfacessuch 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 largevehicle.• The surface streets run parallel to a freeway.• The vehicle has just been transferred by a vehiclecarrier or a ferry.2-38