Express/Savana Infotainment System (GMNA Authoring U.S./Canada)
(GMNA-Localizing-U.S./Canada-13583185) - 2020 - CRC - 6/10/19
Navigation 49
.State the destination and
request it to be downloaded to
the navigation system.
. The destination will then show in
detail on the Destination Entry
display where Start Guidance,
Show On Map, Save, etc., can
be used.
Global Positioning
System (GPS)
The position of the vehicle is
determined by using satellite
signals, various vehicle signals, and
map data.
At times, other interference such as
the satellite condition, road
configuration, condition of the
vehicle, and/or other circumstances
can affect 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. When the
vehicle is not receiving signals from the satellites, a symbol appears on
the map display. See
Navigation
Symbols 039.
This system might not be available
or interference can occur if any of
the following are true:
. Signals are obstructed by tall
buildings, trees, large trucks,
or a tunnel.
. Satellites are being repaired or
improved.
For more information if the GPS is
not functioning properly, see
Problems with Route Guidance 050
and
If the System Needs Service 050.
Vehicle Positioning
At times, the position of the vehicle
on the map could 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 sand,
gravel, or snow. .
The vehicle is traveling on
winding roads or long straight
roads.
. The vehicle is approaching a tall
building or a large vehicle.
. The surface streets run parallel
to a freeway.
. The vehicle has 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 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 the
vehicle.
. Tire chains have been installed.
. The tires are replaced or worn.
