Cadillac Automobile Owner's Manual page 258

Vehicle is driving in heavy traffic
where driving is at low speeds,
and the vehicle is stopped and
started repeatedly.
See your dealer if other problems
occur.
Inappropriate route guidance may
occur under one or more of the
following conditions:
You have not turned onto the
road indicated.
Route guidance may not be
available when using automatic
rerouting for the next right or
left turn.
The route may not be changed
when using automatic rerouting.
There is no route guidance when
turning at an intersection.
Plural names of places may be
announced occasionally.
It may take a long time to
operate automatic rerouting
during high-speed driving.
Automatic rerouting may display
a route returning to the set
stopover if you are heading for a
destination without passing
through a set stopover.
The route prohibits the entry of a
vehicle due to a regulation by
time or season or any other
regulation which may be given.
Some routes may not be
searched.
The route to the destination may
not be shown if there are new
roads, if roads have recently
changed, or if certain roads are
not listed on the map DVD. See
To recalibrate the vehicle's position
on the map, see your dealer.
If the navigation system needs
service and the steps listed here
have been followed but there are
still problems, see your dealer for
assistance.
Coverage area depends upon the
map detail available. Some areas
have greater map detail than others.
The navigation system works only
as well as the information provided
on the stored map data. See
to obtain updated map information.
on how