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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.
The tire pressure for the tires is incorrect.
This is the first navigation use after the
map data is updated.
The 12-volt battery is disconnected for
several days.
The vehicle is driving in heavy traffic
where driving is at low speeds, and the
vehicle is stopped and started repeatedly.
Problems with Route Guidance
Inappropriate route guidance can occur
under one or more of the following
conditions:
The turn was not made on the road
indicated.
Route guidance might not be available
when using automatic rerouting for the
next right or left turn.
The route might not be changed when
using automatic rerouting.
There is no route guidance when turning
at an intersection.
Plural names of places might be
announced occasionally.
It could take a long time to operate
automatic rerouting during high-speed
driving.
Automatic rerouting might display a route
returning to the set waypoint if heading
for a destination without passing through
a set waypoint.
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 might not be searched.
Infotainment System
The route to the destination might not be
shown if there are new roads, if roads
have recently changed, or if certain roads
are not listed in the map data. See Maps
0 142.
To recalibrate the vehicle's position on the
map, park with the vehicle running for two
to five minutes, until the vehicle position
updates. Make sure the vehicle is parked in
a location that is safe and has a clear view
of the sky and away from large
obstructions.
If the System Needs Service
If the navigation system needs service and
the steps listed here have been followed but
there are still problems, see your dealer.
Map Data Updates
The map data in the vehicle is the most
up-to-date information available when the
vehicle was produced. The map data is
updated periodically, provided that the map
information has changed.
For questions about the operation of the
navigation system or the update process,
contact the GM Nav Disc Center toll-free
phone number, 1-877-NAV-DISC
(1-877-628-3472) or go to the center s
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