Page 122 of 570

Your vehicle has a Computer-Controlled
Cranking System. This feature assists in
starting the engine and protects components. If
the ignition key is turned to the START position,
and then released when the engine begins
cranking, the engine will continue cranking for a
few seconds or until the vehicle starts. If the
engine does not start and the key is held in
START for many seconds, cranking will be
stopped after 15 seconds to prevent cranking
motor damage. To prevent gear damage, this
system also prevents cranking if the engine is
already running. Engine cranking can be
stopped by turning the ignition switch to the
ACCESSORY or LOCK position.
Notice:Cranking the engine for long periods
of time, by returning the key to the START
position immediately after cranking has ended,
can overheat and damage the cranking
motor, and drain the battery. Wait at least
15 seconds between each try, to allow
the cranking motor to cool down.2. If the engine does not start after 5-10 seconds,
especially in very cold weather (below 0°F
or−18°C), it could be ooded with too much
gasoline. Try pushing the accelerator
pedal all the way to the oor and holding it
there as you hold the key in START for up to
a maximum of 15 seconds. Wait at least
15 seconds between each try, to allow the
cranking motor to cool down. When the engine
starts, let go of the key and accelerator. If
the vehicle starts brie y but then stops again,
do the same thing. This clears the extra
gasoline from the engine. Do not race the
engine immediately after starting it. Operate
the engine and transmission gently until the oil
warms up and lubricates all moving parts.
Notice:Your engine is designed to work with
the electronics in your vehicle. If you add
electrical parts or accessories, you could
change the way the engine operates. Before
adding electrical equipment, check with
your dealer. If you do not, your engine might
not perform properly. Any resulting damage
would not be covered by your vehicle’s
warranty.
122
Page 273 of 570

If there is a decreased audio signal during CD,
MP3, or DVD play, there could be a soft hissing
noise through the speakers and/or headphones.
If the hissing sound in the wireless headphones
seem excessive, make sure the headphone
batteries are fully charged. A small amount of
hissing is normal.
Battery Replacement
To change the batteries, do the following:
1. Press down on the left earpiece and slide the
battery compartment panel down to expose
the battery compartment.
2. Replace the two AAA batteries in the
compartment. Make sure they are installed
correctly using the diagram on the inside
of the battery compartment.
3. Slide the battery compartment panel back and
then down until the panel closes into the
headphone ear piece.
If the headphones are to be stored for a long
period of time, remove the batteries, and keep
them in a cool, dry place.
Wired Headphones
There is a headphone jack on the left lower side
of the video screen. Use this jack with universal
wired headphones. To adjust the volume, do
the following:
1. Press the power button on the monitor to turn
the video screen on. Brie y press the power
button again to toggle between monitor and
DVD control buttons. The appropriate toggle is
monitor. Main menu function icons display.
2. Plug the headphone into the corresponding
jack, located on the bottom left of the video
screen, next to the auxiliary jack.
3. Press the soft key buttons on the monitor,
located under the up and down arrow icons,
to increase or to decrease the volume.
Audio Output
Audio from the DVD player or auxiliary devices
can be heard through the vehicle speakers or the
wireless/wired headphones. The FM Modulator
control has to be set to one of eight frequencies in
order for these devices to be heard through the
vehicle’s speakers. See “FM Modulator Control”
later in this section.
273
Page 542 of 570

Roadside Assistance Program
As the owner of a new HUMMER vehicle, you are
automatically enrolled in the HUMMER Roadside
Assistance program. This value-added service
is intended to provide peace of mind as you drive
in the city or travel the open road. In the U.S.,
call1-866-HUMMER6 (486-6376)and in Canada,
call1-800-268-680024 hours a day, 365 days
a year to speak with a HUMMER Roadside
Assistance Representative.
The following services are provided in the U.S.
during the Bumper-to-Bumper warranty period and
the Base Warranty period of the New Vehicle
Limited Warranty in Canada up to a maximum
coverage of $100.
Fuel Delivery:Delivery of enough fuel
($5 in the U.S. and 10 litres in Canada
maximum) for the customer to get to the
nearest service station.
Service to provide diesel may be restricted.
For safety reasons, propane and other alternate
fuels will not be provided.
Lock-out Service (identi cation required):
Lock-out service will be covered at no charge if
you are unable to gain entry into your vehicle.
If your vehicle will not start, Roadside
Assistance will arrange to have your vehicle
towed to the nearest authorized dealership.
In the U.S., a replacement key will be delivered
within 10 miles.
Emergency Tow from a Public Roadway or
Highway:Tow to the nearest dealership for
warranty service or in the event of a
vehicle-disabling accident.
Flat Tire Change:Installation of your vehicle’s
spare tire in good condition will be covered at
no charge. The customer is responsible for the
repair or replacement of the tire if not covered
by a warrantable failure.
Jump Start:No-start occurrences which
require a battery jump start will be covered at
no charge.
Dealer Locator Service:Directions to the
nearest dealer.
542