Global Positioning System (Gps); Vehicle Positioning - Chevrolet 2007 Avalanche Navigation Manual

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 20.
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.
56
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 58 and Problems with Route Guidance
on page 57.

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.