ignition HUMMER H3 2007 Owner's Manual

Parking Brake
The parking brake pedal
is located to the left of
the regular brake pedal,
near the driver’s door.
To set the parking brake, hold the regular brake
pedal down with your right foot. Push the
parking brake pedal down to its fully-applied
position with your left foot.
A chime will activate and the brake warning light,
located on the instrument panel, will ash
when the parking brake is applied and the vehicle
is moving at least 3 mph (5 km/h) for at least
three seconds. The chime will deactivate and the
light will turn off when the parking brake is set
and the vehicle is moving below 3 mph (5 km/h).
SeeBrake System Warning Light on page 182.To release the parking brake, hold the regular
brake pedal down. Pull the bottom edge of
the lever, located above the parking brake pedal,
with the parking brake symbol, directly rearward
to release the parking brake.
If the ignition is on when the parking brake is
released, the brake system warning light will go off.
Notice:Driving with the parking brake on can
overheat the brake system and cause premature
wear or damage to brake system parts. Verify
that the parking brake is fully released and the
brake warning light is off before driving.
If you are towing a trailer and are parking on any
hill, seeTowing a Trailer on page 297.
116

Shifting Into Park (P)
(Automatic Transmission)
{CAUTION:
It can be dangerous to get out of your
vehicle if the shift lever is not fully in
PARK (P) with the parking brake rmly
set. Your vehicle can roll. If you have left
the engine running, the vehicle can move
suddenly. You or others could be injured.
To be sure your vehicle will not move,
even when you are on fairly level ground,
use the steps that follow. If you are
pulling a trailer, seeTowing a Trailer on
page 297.
1. Hold the brake pedal down with your right foot
and set the parking brake.
{CAUTION:
With all-wheel drive, your vehicle will be
free to roll — even if your shift lever is in
PARK (P) — if your transfer case is in
NEUTRAL. So, be sure the transfer case is
in a drive gear, four-wheel high (4H) or
four-wheel low (4L) — not in NEUTRAL.
2. Move the shift lever into PARK (P) by pressing
the shift lever button and moving the lever as
far forward as it will go.
3. Turn the ignition key to LOCK.
4. Remove the key and take it with you. If you
can leave your vehicle with the key, your
vehicle is in PARK (P).
117

Shifting Out of Park (P)
(Automatic Transmission)
Your vehicle has an automatic transmission shift
lock control system. You have to apply your
regular brake before you can shift from PARK (P)
when the ignition is in ON. SeeAutomatic
Transmission Operation on page 106.
If you cannot shift out of PARK (P), ease pressure
on the shift lever and push the shift lever all the way
into PARK (P) as you maintain brake application.
Then move the shift lever into the gear you wish.
Press the shift lever button before moving the
shift lever.
Parking Your Vehicle
(Manual Transmission)
Your vehicle has a manual transmission. Before
you get out of your vehicle, move the shift
lever into REVERSE (R), and rmly apply the
parking brake. Once the shift lever has been
placed into REVERSE (R) with the clutch pedal
pressed in, turn the ignition key to LOCK, remove
the key and release the clutch.
If you are parking on a hill, or if your vehicle is
pulling a trailer, seeTowing a Trailer on page 297.
Parking Over Things That Burn
{CAUTION:
Things that can burn could touch hot
exhaust parts under your vehicle and
ignite. Do not park over papers, leaves,
dry grass, or other things that can burn.
119

Automatic Dimming Mirror Operation
The automatic dimming mirror function is turned on
automatically each time the ignition is started.
To operate the automatic dimming mirror, do the
following:
1. Make sure the green indicator light, located to
the left of the on/off button, is lit. If it is not,
press and hold the on/off button for
approximately six seconds until the green light
comes on, indicating that the mirror is in
automatic dimming mode.
2. Turn off the automatic dimming mirror function
by pressing and holding the on/off button for
approximately six seconds, until the green
indicator light turns off.
Compass Calibration
The compass may need calibration if one of the
following occurs:
After approximately ve seconds, the display
does not show a compass heading, N for
North, for example, there may be a strong
magnetic eld interfering with the compass.
Such interference may be caused by a
magnetic antenna mount, magnetic note pad
holder, or a similar magnetic item.
The compass does not display the correct
heading and the compass zone variance
is set correctly.
In order to calibrate, CAL must be displayed in the
mirror compass windows. If CAL is not displayed,
push the on/off button for approximately
12 seconds or until CAL is displayed.
The compass can be calibrated by driving the
vehicle in circles at 5 mph (8 km/h) or less until the
display reads a direction.
123

Sunroof
Your vehicle may have a power sliding sunroof.
The ignition must be on or in ACC, or Retained
Accessory Power (RAP) must be active. See
Retained Accessory Power (RAP) on page 103.
The switch used to
operate the sunroof is
located in the headliner.
Open/Close:Press and release the back of the
switch to open the sunroof. If the sunshade is in the
closed position, it will automatically open with the
sunroof. To stop the sunroof before it has reached
the full open position press and release the front or
back of the switch. An air deector will raise when
the sunroof is fully opened.
Press the front of the switch to close the sunroof.To stop the sunroof before it is fully closed, press
and release the front or back of the switch.
Vent:Press and hold the back of the switch to
vent the sunroof. To stop the sunroof before
it reaches its full vent position, release the switch.
Do not keep the sunroof open for long periods
of time as debris may collect in the tracks.
Sunshade Operation
The sunshade will open automatically open with
the sunroof.
However, it can manually be pulled shut after the
sunroof is closed. To adjust the sunshade,
push it backward or pull it forward to the desired
position. The sunshade cannot be adjusted further
than the current closed position of the sunroof.
Anti-Pinch Feature
If an object is in the path of the sunroof when it is
closing, the anti-pinch feature will detect the
object and stop the sunroof from closing at the
point of the obstruction. The sunroof will then
return to the full-open or vent position, and the air
deector will raise.
147

Hazard Warning Flashers
Your hazard warning ashers let you warn others.
They also let police know you have a problem.
Your front and rear turn signal lamps will ash
on and off.
The hazard warning
asher button is located
in the center of the
instrument panel.
Your hazard warning ashers work no matter
what position your key is in, and even if the key
is not in the ignition switch.
Press the button to make the front and rear turn
signal lamps ash on and off. Press the button
again to turn the ashers off.
When the hazard warning ashers are on, your
turn signals will not work.
Other Warning Devices
If you carry reective triangles, you can set one
up at the side of the road about 300 feet (100 m)
behind your vehicle.
Horn
To sound the horn, press the horn symbol on the
steering wheel pad.
Tilt Wheel
A tilt wheel allows the steering wheel to be adjusted
before driving. It can be raised to allow more room
for the driver to enter and exit the vehicle.
154

Using Cruise Control on Hills
How well your cruise control works on hills depends
upon your speed, load, and the steepness of the
hills. When going up steep hills, you might want
to step on the accelerator pedal to maintain the
vehicle speed. When going downhill, you might
have to brake or shift to a lower gear to keep the
vehicle speed down. Of course, applying the brake
turns off the cruise control. Many drivers nd this
to be too much trouble and do not use cruise control
on steep hills.
Ending Cruise Control
To turn off the cruise control, do one of the following:
Step lightly on the brake pedal.
Move the cruise control switch to off.
Lightly tap or press the clutch, if you have
a manual transmission.
Erasing Speed Memory
When you turn off the cruise control or the ignition,
the cruise control set speed memory is erased.
Exterior Lamps
The control on the driver’s side of your instrument
panel operates the exterior lamps.
O(Exterior Lamps):Turn the knob, located to
the right of this symbol, to choose one of the
four exterior lamp positions.
162

Vehicles rst sold in Canada with an automatic
transmission cannot turn off automatic headlamps
unless the gear position is in PARK (P) and
the headlamp switch is turned to the Off position.
Vehicles rst sold in Canada with a manual
transmission can turn off the automatic headlamps
with the headlamp control; however, the parking
lamps will remain on.
;(Parking Lamps):Turn the knob to this
position to turn on the parking lamps, together
with the following:
Sidemarker Lamps
Taillamps
License Plate Lamps
Instrument Panel Lights
2(Headlamps):Turn the knob to this position
to turn on the headlamps, together with the
previously listed lamps and lights.
You can switch your headlamps from low to high
beam by pushing the turn signal/multifunction
lever toward the instrument panel.
Headlamps on Reminder
A headlamp reminder chime will sound if the
following conditions are met:
The driver door is open.
Parking lamps or headlamps are manually
turned on.
The key is either not in the ignition switch, or it
is in the LOCK position of the ignition switch.
The headlamp reminder cannot be turned off if
the conditions listed above are met.
In the automatic mode, the headlamps turn off
once the ignition is in ACC.
Daytime Running Lamps (DRL)
Daytime Running Lamps (DRL) can make it easier
for others to see the front of your vehicle during
the day. DRL can be helpful in many different
driving conditions, but they can be especially
helpful in the short periods after dawn and before
sunset. Fully functional daytime running lamps
are required on all vehicles rst sold in Canada.
164

The DRL system will come on when the following
conditions are met:
The ignition is on.
The exterior lamps control is in AUTO.
The transmission is not in PARK (P) if
you have an automatic transmission.
The light sensor determines it is daytime.
When the DRL are on, no other lamps are on.
The instrument panel will not be lit up either.
For vehicles rst sold in Canada, if parking
lamps are manually turned on, DRL will stay on.
When it begins to get dark, the automatic
headlamp system will switch from DRL to the
headlamps.
As with any vehicle, you should turn on the
regular headlamp system when you need it.
To turn off the DRL, seeExterior Lamps
on page 162.
Vehicles rst sold in Canada cannot turn
off DRL unless certain conditions are met.
SeeExterior Lamps on page 162.
Automatic Headlamp System
When it is dark enough outside, the automatic
headlamp system will turn on after the transmission
has been shifted from PARK (P) to DRIVE (D).
The headlamps, taillamps, sidemarker, parking
lamps, roof marker lamps, and the instrument panel
lights will turn on at normal brightness. The radio
lights will become more dim when the headlights
are off compared to when the headlights are on.
Your vehicle has a light sensor located on the top of
the instrument panel. Be sure it is not covered, or
the system will be on whenever the ignition is on.
The system may also turn on the headlamps when
driving through a parking garage, heavy overcast
weather, or a tunnel. This is normal.
There is a delay in the transition between the
daytime and nighttime operation of the Daytime
Running Lamps (DRL) and the automatic headlamp
system so that driving under bridges or bright
overhead street lights does not affect the system.
The DRL and automatic headlamp system will only
be affected when the light sensor detects a change
in lighting lasting longer than the delay.
165

If you start your vehicle in a dark garage, the
automatic headlamp system will come on
immediately. Once you leave the garage, it will
take about one minute for the automatic headlamp
system to change to DRL if it is light outside.
During that delay, the instrument panel cluster
may not be as bright as usual. Make sure
the instrument panel brightness control is in
the full bright position. SeeInstrument Panel
Brightness on page 167.
Off-Road Lamps
The off-road lamps, if the vehicle has them,
provide auxiliary lighting when the vehicle is
used off road. These lamps are not intended to
be used in place of existing vehicle lighting.
The lamps are not to be used on any public street
or highway and are to be covered when not in
use. Check your state and local laws before
installing or using any auxiliary lighting. In some
states it may be necessary to remove the roof
lamps when operating the vehicle on the highway.The switches for the off-road lamps are located in
the center of the instrument panel below the climate
controls. One switch is used for the front lower-grille
mounted off-road lamps, if the vehicle has them,
and the other switch is used for the roof-mounted
off-road lamps, if the vehicle has them.
To use the lamps, remove the covers from the
lamps and press the switch to turn them on or
off. An indicator light on the switch will turn
on when the lamps are on.
Notice:Turning on the off-road lamps before
removing the lamp covers could damage the
off-road lamps and the covers. Always remove
the covers before turning on the off-road lamps.
The off-road lamps remain on even after the ignition
is turned off. The off-road lamp switch must be
pressed to turn them off.
Roof Mounted Off-Road
Light SwitchLower Grille Off-Road
Light Switch
166