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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 con guration, 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 Symbols on page 4-19 . This system may not be available or interferences may
occur if any of the following are true:
Signals are obstructed by tall buildings, trees, large
trucks, or a tunnel.
Objects are located on the front dash of the vehicle.
Satellites are being repaired or improved.
After-market glass tinting has been applied to the
vehicle’s 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 If the System Needs Service on page 4-61
and Problems with Route Guidance on page 4-61 .
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Vehicle Positioning At times, the position of the vehicle on the map may be
inaccurate due to one or more of the following reasons:
Road system has changed.
Vehicle is driving on slippery road surfaces such as
in sand, gravel, and/or snow.
Vehicle is traveling on winding roads.
Vehicle is on a long straight road.
Vehicle is approaching a tall building or a large
vehicle.
Surface streets run parallel to a freeway.
Vehicle has just been transferred by a vehicle carrier
or a ferry.
Current position calibration is set incorrectly.
Vehicle is traveling at high speed. Vehicle changes directions more than once, or when
the vehicle is turning on a turn table in a parking lot.
Vehicle is entering and/or exiting a parking lot or a
garage.
GPS signal is not received.
Roof carrier is installed on the vehicle.
Vehicle is being driven with tire chains.
Tires are replaced.
Tire pressure for the tires is incorrect.
Tires are worn.
First time the map DVD is inserted.
Battery is disconnected for several days.
Vehicle is driving in heavy traffic where driving is at
low speeds, and the vehicle is stopped and started
repeatedly.
See your dealer/retailer if other problems occur.
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Problems with Route Guidance 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 Ordering Map DVDs on page 4-61 .
To recalibrate the vehicle’s position on the map, see
your dealer/retailer.
If the System Needs Service If your system needs service and you have followed the
steps listed here and still are experiencing problems,
see your dealer/retailer for assistance.
Ordering Map DVDs The map DVD in your vehicle is the most up-to-date
information available when your vehicle was produced.
The map DVD is updated periodically, provided that
the map information has changed.
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If you have any 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
website, gmnavdisc.com. If you need any updates or
a replacement disc, because the current disc is lost,
damaged, or needs to be updated, call the GM Nav
Disc Center or order a new disc online. To order a disc,
have your Vehicle Identi cation Number (VIN) available.
This helps the center make sure you receive the correct
and most up-to-date DVD map disc for your vehicle.
See “Vehicle Identi cation Number (VIN)” in the Index
of your vehicle’s owner manual for more information.
After receiving the updated disc, replace the old disc
in the navigation system. See “Installing the DVD Map
Disc” and “Ejecting the DVD Map Disc” under Maps
on page 4-15 . Dispose of the old disc to avoid confusion
about which disc is the most current.
Database Coverage Explanations 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 map disc. See Ordering Map DVDs on
page 4-61 on how to obtain updated map information. Navigation Audio System Notice: Before adding any sound equipment to
the vehicle, such as an audio system, CD player,
CB radio, mobile telephone, or two-way radio, make
sure that it can be added by checking with your
dealer/retailer. Also, check federal rules covering
mobile radio and telephone units. If sound equipment
can be added, it is very important to do it properly.
Added sound equipment can interfere with the
operation of the vehicle’s engine, radio, or other
systems, and even damage them. The vehicle’s
systems can interfere with the operation of sound
equipment that has been added.
Notice: The chime signals related to safety belts,
parking brake, and other functions of the vehicle
operate through the navigation system. If that
equipment is replaced or additional equipment is
added to the vehicle, the chimes may not work.
Make sure that replacement or additional equipment
is compatible with the vehicle before installing it.
See “Accessories and Modi cations” in the Index
of the vehicle’s owner manual.
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Playing the Radio
O /
n (Power/Volume): Press to turn the audio
system on and off. Turn to increase or to decrease
the volume.
Press and hold for more than two seconds to turn off the
navigation system, the Rear Seat Entertainment (RSE)
video screen, and Rear Seat Audio (RSA). If the vehicle
has not been turned off, press this knob to turn RSE and
RSA back on and to continue playback of the last active
source.
w (Tuning Knob): Turn to go to the next or
previous frequency or disc track or chapter. See CD
Player on page 4-71 or DVD Player on page 4-78
for more information.
AUDIO: Press to display the audio screen. Press to
switch between AM, FM, or XM, if equipped, DISC, or
AUX (Auxiliary), or touch the screen button. See CD
Player on page 4-71 , DVD Player on page 4-78 ,
and Auxiliary Devices on page 4-85 for more
information. Finding a Station
If viewing a map screen, touch the source screen (AM,
FM, XM, CD, etc.) button. The display splits between the
audio screen and the map screen. All station-changing
functions can be performed from this screen. AM source shown, other sources similar
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If you do not want to view a split screen or you are not
on a map screen, press the AUDIO hard key.
AM/FM/XM: Touch the source (AM, FM, or XM, if
equipped) screen button or press the AUDIO key
repeatedly until the desired source is highlighted. Category: Touch the screen button, located in the
middle of the screen, to receive a list of all of the selected
band stations in the area. Use the up and down arrows to
scroll the frequencies. Touch the desired frequency.
XM lists also contain a category to select and the
stations or channels that have broadcasts that relate
to that category. For XM, touch the left and right
arrow screen buttons to change categories.FM source shown, other sources similar
FM source shown, other sources similar
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The station information appears on the display.
See “Radio Menu” later in this section to add and
remove XM categories from the category list. Removed
categories do not appear on the category list screen or
when the right and left arrow category screen buttons
are used.
FM lists may also contain a category to select if
stations in the broadcast area support Radio Data
Systems (RDS).
2 Refresh List: Touch to refresh the list of AM or
FM stations.
When viewing a map screen, the name of the station or
channel displays.
y©¨z (Seek): To seek stations, press the up or
down arrows to go to the next or previous station.
To scan stations, press and hold either arrow for more
than two seconds. The radio goes to a station, plays
for a few seconds, then goes to the next station.
To stop scanning, press either arrow again. Storing Radio Station Presets This feature stores a mix of up to 30 AM, FM, and XM
(if equipped) preset stations. To store presets:
1. Press
O to turn the system on.
2. If viewing a map screen, touch the source screen
button, press the AUDIO key, or press the FAV
(favorite) key.
3. Select the band.
4. Seek, scan, or tune to the desired station, to select
the station.
5. Press and hold one of the preset screen buttons for
more than two seconds or until a beep is heard.
6. Repeat the steps for each preset.
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Sound Menu
e (Sound): Press this key or press the CONFIG key
to access the Sound menu to adjust the treble, midrange,
bass, fade, balance, and Digital Signal Processing (DSP).
The system automatically stores audio adjustment
settings as changes are made for each audio source
including AM, FM, XM (if equipped), CD, and AUX. Setting the Tone TREBLE: Touch the plus (+) or minus ( − ) sign to
increase or decrease the treble. If a station is weak
or has static, decrease the treble.
MID (Midrange): Touch the plus (+) or minus ( − ) sign
to increase or decrease the midrange.
BASS: Touch the plus (+) or minus ( − ) sign to increase
or decrease the bass.
Adjusting the Speakers L/R (Left/Right) (Balance): To adjust the balance
between the left and the right speakers, touch and
hold the L or R screen buttons.
Front/Rear (Fade): To adjust the fade between the
front and the rear speakers, touch and hold the Front
or Rear screen buttons.
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