2009 HUMMER H3 lock

An indicator light will ash while
shifting the transfer case. If the
transfer case cannot make a
requested shift, it will return to the
last chosen setting.
If the SERV 4WD message on the
Driver Information Center (DIC)
stays on, take the vehicle to
your dealer/retailer for service.
See Service 4WD message under
DIC Warnings and Messages
on page 3-37.
Shifting between Four-Wheel
High and Four-Wheel-High Lock
With the vehicle traveling less
than 75 mph (120 km/h), press and
release the Four-Wheel High or
Four-Wheel-High Lock button.
It may be necessary to drive
backwards while turning for a
distance of 25 feet (7.5 m) to get
the lock feature to disengage.Shifting into Four-Wheel Low Lock
Notice:Shifting the transmission
into gear before the indicator
light stops ashing could cause
damage to the transfer case.
Always wait until the indicator
light stops ashing before putting
the transmission back in gear.
To shift into Four-Wheel-Low Lock,
the ignition must be in ON/RUN
and the vehicle must be stopped or
moving less than 3 mph (5 km/h)
with the transmission in N (Neutral).
The preferred method for shifting
into Four-Wheel Low is to have
the vehicle moving 1 to 2 mph
(1.6 to 3.2 km/h). Press and release
the Four-Wheel-Low Lock button.
If the vehicle has a manual
transmission, the clutch pedal must
be pressed to the oor while you
press the Four-Wheel-Low Lock
button, or the shift will not be
completed. You must wait for theFour-Wheel-Low Lock indicator
light to stop ashing and remain lit
before shifting the transmission
into gear.
It is normal for the vehicle to have
engagement noise and bump
when shifting between Four-Wheel
Low and Four-Wheel High ranges
or from Neutral.
If the Four-Wheel-Low Lock button
is pressed when the vehicle is
in gear and/or moving too fast, the
Four-Wheel-Low Lock indicator
light will ash for 15 seconds and
not complete the shift.
Features and Controls 2-25

Shifting Out of
Four-Wheel-Low Lock
Notice:Shifting the transmission
into gear before the indicator
light stops ashing could cause
damage to the transfer case.
Always wait until the indicator
light stops ashing before putting
the transmission back in gear.
To shift out of Four-Wheel-Low Lock,
the vehicle must be stopped or
moving less than 3 mph (5 km/h)
with the transmission in N (Neutral)
and the ignition in ON/RUN.
The preferred method for shifting out
of Four-Wheel-Low Lock is to have
the vehicle moving 1 to 2 mph
(1.6 to 3.2 km/h). Press and
release the Four-Wheel High or
Four-Wheel-High Lock button.If the vehicle has a manual
transmission, the clutch pedal must
be pressed to the oor while you
press the Four-Wheel High or
Four-Wheel-High Lock button, or the
shift will not be completed. You must
wait for the Four-Wheel High or
Four-Wheel-High Lock indicator light
to stop ashing and remain lit before
shifting the transmission into gear.
It is normal for the vehicle to have
engagement noise and bump
when shifting between Four-Wheel
Low and Four-Wheel High ranges
or from Neutral.
If the Four-Wheel High or
Four-Wheel-High Lock button is
pressed when the vehicle is in
gear and/or moving too fast,
the Four-Wheel High or
Four-Wheel-High Lock indicator
light will ash for 15 seconds but
will not complete the shift.Shifting Into Neutral
To shift the transfer case to Neutral:
1. Set the parking brake.
2. Start the vehicle.
3. Put the transmission in
N (Neutral). If the vehicle has a
manual transmission, press and
hold the clutch pedal down while
you perform Steps 5 through 9.
4. Shift the transfer case to
Four-Wheel High.
{CAUTION
Shifting an all-wheel-drive
vehicle’s transfer case into
Neutral can cause the vehicle
to roll even if the automatic
transmission is in P (Park) or the
manual transmission is in any
gear. You or others could be
injured. Make sure the parking
brake is rmly set before you shift
the transfer case to Neutral.
2-26 Features and Controls

5. Simultaneously press and hold
the Four-Wheel High and
Four-Wheel-Low Lock buttons for
10 seconds. The Neutral light
will come on when the transfer
case shift to Neutral is complete.
6. Press and hold the regular brake
pedal and shift the transmission
to R (Reverse), then shift the
transmission to D (Drive) for an
automatic transmission, or
1 (First) for vehicles have a
manual transmission and then let
out the clutch. This is to ensure
the transfer case is in Neutral.
If not, repeat this procedure
starting at Step 3.
7. Turn the engine off.
8. Place the transmission shift lever
in P (Park) for an automatic
transmission, or 1 (First) for
vehicles that have a manual
transmission.
9. Turn the ignition to LOCK/OFF.Shifting Out of Neutral
To shift out of Neutral:
1. Set the parking brake and apply
the regular brake pedal.
2. Shift the transmission to
N (Neutral) for an automatic
transmission, or press the clutch
pedal for vehicles that have a
manual transmission. Then turn
the ignition to ON/RUN but
do not start the engine.
3. Press the button for the desired
transfer case shift position
(Four-Wheel High,
Four-Wheel-High Lock or
Four-Wheel-Low Lock).
After the transfer case has
shifted out of Neutral the light
will go out.
4. Release the parking brake.Notice:Shifting the transmission
into gear before the indicator
light stops ashing could cause
damage to the transfer case.
Always wait until the indicator
light stops ashing before putting
the transmission back in gear.
5. You may start the engine and
shift the transmission to the
desired position.
Features and Controls 2-27

Shifting Into Park
(Automatic Transmission)
{CAUTION
It can be dangerous to get out of
the vehicle if the shift lever is not
fully in P (Park) with the parking
brake rmly set. The vehicle can
roll. If you have left the engine
running, the vehicle can move
suddenly. You or others could be
injured. To be sure the 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 4-42.
1. Hold the brake pedal down,
then set the parking brake.
SeeParking Brake on page 2-28
for more information.
{CAUTION
With all-wheel drive, the vehicle
will be free to roll — even if the
shift lever is in P (Park) — if the
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 P (Park)
by pressing the shift lever button
and moving the lever as far
forward as it will go.
3. Turn the ignition key to
LOCK/OFF.
4. Remove the key from the
ignition.
Leaving Your Vehicle
With the Engine Running
(Automatic Transmission)
{CAUTION
It can be dangerous to leave the
vehicle with the engine running.
The vehicle could move suddenly
if the shift lever is not fully in
P (Park) with the parking brake
rmly set. And, if you leave the
vehicle with the engine running,
it could overheat and even catch
re. You or others could be
injured. Do not leave the vehicle
with the engine running.
If you have to leave the vehicle with
the engine running, be sure the
vehicle is in P (Park) and the parking
brake is rmly set before you
leave it. After you have moved the
shift lever into P (Park), hold
the regular brake pedal down.
Features and Controls 2-29

Then, see if you can move the shift
lever away from P (Park) without
rst pressing the shift lever button.
If you can, it means that the
shift lever was not fully locked into
P (Park).
Torque lock is when the weight of
the vehicle puts too much force
on the parking pawl in the
transmission. This happens when
parking on a hill and shifting
the transmission into P (Park) is
not done properly and then it
is difficult to shift out of P (Park).
To prevent torque lock, set the
parking brake and then shift into
P (Park). To nd out how, see
“Shifting Into P (Park)” listed
previously.
If torque lock does occur, your
vehicle may need to be pushed
uphill by another vehicle to relieve
the parking pawl pressure, so
you can shift out of P (Park).Shifting Out of Park
(Automatic
Transmission)
This vehicle is equipped with an
electronic shift lock release system.
The shift lock release is designed to:
Prevent ignition key removal
unless the shift lever is in P (Park)
with the shift lever button fully
released, and
Prevent movement of the shift
lever out of P (Park) unless
the ignition is in ON/RUN or
ACC/ACCESSORY and the
regular brake pedal is applied.
The shift lock release is always
functional except in the case of
a an uncharged or low voltage
(less than 9 volt) battery.
If the vehicle has an uncharged
battery or a battery with low voltage,
try charging or jump starting the
battery. SeeJump Starting on
page 5-34for more information.To shift out of P (Park):
1. Apply the brake pedal.
2. Then press the shift lever button.
3. Move the shift lever to the
desired position.
If you still are unable to shift out
of P (Park):
1. Fully release the shift lever
button.
2. While holding down the brake
pedal, press the shift lever
button again.
3. Move the shift lever to the
desired position.
If you still cannot move the shift
lever from P (Park), consult your
dealer/retailer or a professional
towing service.
2-30 Features and Controls

Parking the Vehicle
(Manual Transmission)
If the vehicle has a manual
transmission, before you get out of
the vehicle, move the shift lever
into R (Reverse), and rmly apply
the parking brake. Once the
shift lever has been placed into
R (Reverse) with the clutch pedal
pressed in, turn the ignition key
to LOCK/OFF, remove the key and
release the clutch.
If you are parking on a hill, or if the
vehicle is pulling a trailer, see
Towing a Trailer on page 4-42.
Parking Over Things
That Burn
{CAUTION
Things that can burn could touch
hot exhaust parts under the
vehicle and ignite. Do not park
over papers, leaves, dry grass, or
other things that can burn.
Engine Exhaust
{CAUTION
Engine exhaust contains Carbon
Monoxide (CO) which cannot be
seen or smelled. Exposure to CO
can cause unconsciousness and
even death.
Exhaust may enter the vehicle if:
The vehicle idles in areas
with poor ventilation (parking
garages, tunnels, deep snow
that may block underbody
airow or tail pipes).
The exhaust smells or
sounds strange or different.
The exhaust system leaks
due to corrosion or damage.
(Continued)
CAUTION (Continued)
The vehicle’s exhaust system
has been modied, damaged
or improperly repaired.
There are holes or openings
in the vehicle body from
damage or after-market
modications that are not
completely sealed.
If unusual fumes are detected or if
it is suspected that exhaust is
coming into the vehicle:
Drive it only with the windows
completely down.
Have the vehicle repaired
immediately.
Never park the vehicle with the
engine running in an enclosed
area such as a garage or a
building that has no fresh air
ventilation.
Features and Controls 2-31

Compass Display
Presszto turn the compass
display on or off.
For more information on the
compass, seeCompass on
page 2-34after, in this section.
Cleaning the Mirror
Do not spray glass cleaner directly
on the mirror. Use a soft towel
dampened with water.
Compass
Compass Calibration
The compass may need to be
calibrated if CAL is not displayed and
the compass requires calibration.Press and hold
Ountil CAL displays
in the compass window, then release
the button. The compass is now in
calibration mode.
Drive the vehicle in circles at less
than 5 mph (8 km/h) until CAL
is no longer displayed in the
compass window. Then continue
to drive to make sure all eight
directions are available.
Drive the vehicle under normal
operating conditions.
Compass Variance
The mirror is set to zone eight.
If you do not live in zone eight or
drive out of the area, the compass
variance needs to be changed
to the appropriate zone.To adjust for compass variance:
1. Find your current location and
variance zone number on the
following zone map.
2. Press and hold
Ofor six seconds
until ZONE displays. Release the
button. The compass is now in
zone mode.
3. Keep pressing
Ountil the desired
zone number displays. Release
the button. After four seconds, the
new zone number locks in and the
compass display returns.
2-34 Features and Controls

When the System Does Not Seem
To Work Properly
The rear vision camera system may
not work properly or display a
clear image:
In the dark.
When the sun or the beam of
headlamps is shining directly
into the camera lens.
If ice, snow, mud, or anything else
builds up on the camera lens.
Clean the lens, rinse it with water,
and wipe it with a soft cloth.
If the back of the vehicle is in an
accident, the position and
mounting angle of the camera
may change or the camera may
be affected. Be sure to have the
camera and its position and
mounting angle checked at your
dealer/retailer.
If there are extreme temperatures
or extreme temperature changes.The rear vision camera system
display in the rearview mirror may
turn off or not appear as expected
due to a loss of video signal, or
no video signal present during the
reverse cycle. The display will
be blank and the left indicator light
will slowly ash as long as the
vehicle is in R (Reverse) or until the
condition returns to normal.
Pressing and holding
zwhen the
left indicator light is ashing will
turn off the video display along with
the left indicator light.
OnStar®System
OnStar uses several innovative
technologies and live advisors to
provide a wide range of safety,
security, information, and
convenience services. If the airbags
deploy, the system is designed to
make an automatic call to OnStar
Emergency advisors who can
request emergency services be sent
to your location. If the keys are
locked in the vehicle, call OnStar
at 1-888-4-ONSTAR to have a
signal sent to unlock the doors.
OnStar Hands-Free Calling,
including 30 trial minutes good for
60 days, is available on most
vehicles. OnStar Turn-by-Turn
Navigation service, with one trial
route, is available on most vehicles.
Press the OnStar button to have
an OnStar advisor contact Roadside
Service.
Features and Controls 2-39