GMC Traverse - Manual (Page 70)

Global Positioning
System (GPS)
The navigation system determines
the position of the 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
system’s ability to determine
the accurate position of the vehicle.
The GPS shows the current position
of the vehicle using signals sent by
the GPS Satellites of the United
States Department of Defense.
When the vehicle is not receiving
signals from the satellites, a symbol
appears on the map screen. Refer to
Navigation Symbols on page 41.
This system may not be available or
interferences may occur if any of
the following is true:
• Signals are obstructed by tall
buildings, trees, large trucks,
or a tunnel.
• Objects are located on the rear
shelf of the vehicle.
• Satellites are being repaired or
improved.
• After-market glass tinting has
been applied to the vehicle’s
rear windshield.
Notice: Do not apply after-market
glass tinting to the vehicle’s
windows. Glass tinting interferes
with the system’s ability to
receive GPS signals and causes
the system to malfunction.
The window might have to be
replaced to correct the problem.
This would not be covered by
the warranty.
For more information if the GPS
is not functioning properly, see
Problems with Route Guidance
on page 71 and If the System
Needs Service on page 72.
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.
70 Infotainment System