2006 HUMMER H3 Transfer case

Up-Shift Light
This light will show you
when to shift to the next
higher gear for best
fuel economy.
When this light comes on, you can shift to the next
higher gear if weather, road and traffic conditions permit.
For the best fuel economy, accelerate slowly and shift
when the light comes on.
While you accelerate, it is normal for the light to go on
and off if you quickly change the position of the
accelerator. Ignore the shift light when you downshift.
If your vehicle has four-wheel drive and is equipped with
a manual transmission, disregard the shift light when
the transfer case is in four-wheel low.
For more information, seeUp-Shift Light (Manual
Transmission) on page 3-31.
Shift Speeds
{CAUTION:
If you skip a gear when you downshift, you
could lose control of your vehicle. You could
injure yourself or others. Do not shift down
more than one gear at a time when you
downshift.
All-Wheel Drive
All-wheel drive sends your engine’s driving power to all
four wheels for extra traction. To get the most out of
all-wheel drive, you must be familiar with its operation.
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Transfer Case Buttons
The transfer case buttons are located to the right of the
instrument panel cluster. Use these switches to shift
into and out of the different all-wheel drive modes.
You can choose between four modes:
4
m(Four-Wheel High):This setting is used for
driving in most street and highway situations. You can
also use this setting for light or variable off-road
conditions.
N (NEUTRAL):Shift the vehicle’s transfer case to
NEUTRAL only when towing your vehicle. See
Recreational Vehicle Towing on page 4-57orTowing
Your Vehicle on page 4-57for more information.Notice:Driving on pavement in Four-Wheel
High Lock or Four Wheel Low Lock for extended
periods may cause premature wear on your vehicle’s
powertrain and tires. Do not drive in Four-Wheel
High Lock or Four-Wheel Low Lock on pavement for
extended periods.
4
mQ(Four-Wheel-High Lock):Use this mode
when you need extra traction in most off-road situations
such as sand, mud, snow or level, rocky trails.
Notice:Operating your vehicle in
Four-Wheel-Low Lock above 30 mph (48 km/h) for
any extended period of time could cause damage to
the transfer case. Do not operate your vehicle in
Four-Wheel-Low Lock above 30 mph (48 km/h)
for extended periods.
4
nQ(Four-Wheel-Low Lock):This mode
delivers extra torque to all four wheels and is used
for extreme off-road conditions. You might choose
4-Wheel-Low Lock if you are driving in off-road
situations, such as, deep sand, mud, or snow and
climbing or descending steep hills.
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When in this mode you can also choose to lock the rear
axle, if equipped, for additional traction in extreme
off-road situations. SeeLocking Rear Axle on page 4-10.
Indicator lights in the buttons show which mode you
are in. The indicator lights will come on briey when you
turn on the ignition the mode the vehicle is in will stay
on. If the lights do not come on, you should take
your vehicle to your dealer for service. An indicator light
will ash while shifting the transfer case. It will remain
lit when the shift is complete. If for some reason
the transfer case cannot make a requested shift, it will
return to the last chosen setting.
If the SERV 4WD message stays on, you should take
your vehicle to your dealer for service. See Service 4WD
message underDIC Warnings and Messages on
page 3-44.
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. The indicator light will
ash while shifting. It will remain lit when the shift
is complete.
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 and the vehicle must be stopped or moving
less than 3 mph (5 km/h) with the transmission in
NEUTRAL (N). The preferred method for shifting into
Four-Wheel Low is to have your vehicle moving
1 to 2 mph (1.6 to 3.2 km/h). Press and release the
Four-Wheel-Low Lock button. If your 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 the Four-Wheel-Low Lock
indicator light to stop ashing and remain lit before
shifting your transmission in gear.
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It is normal for your vehicle to have engagement noise
and bump when shifting between Four-Wheel Low
and Four-Wheel High ranges or from NEUTRAL with
the engine running.
If the Four-Wheel-Low Lock button is pressed when
your 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 unless your
vehicle is moving less than 3 mph (5 km/h) and
the transmission is in NEUTRAL (N). After 15 seconds
the transfer case will return to the last chosen setting.
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, your vehicle must
be stopped or moving less than 3 mph (5 km/h) with
the transmission in NEUTRAL (N) and the ignition in ON.
The preferred method for shifting out ofFour-Wheel-Low Lock is to have your 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
your 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
your transmission into gear.
It is normal for your vehicle to have engagement noise
and bump when shifting between Four-Wheel Low
and Four-Wheel High ranges or from NEUTRAL with
the engine running.
If the Four-Wheel High or Four-Wheel-High Lock button
is pressed when your 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 unless your vehicle is moving less
than 3 mph (5 km/h) and the transmission is in
NEUTRAL (N).
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Shifting Into NEUTRAL
To shift the transfer case to NEUTRAL, do the following:
1. Set the parking brake.
2. Start the vehicle by turning the ignition to START.
3. Put the transmission in NEUTRAL (N). If your
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 your vehicle to
roll even if the automatic transmission is in
PARK (P) 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.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 REVERSE (R) for one second,
then shift the transmission for one second to
DRIVE (D) for an automatic transmission, or
FIRST (1) for vehicles equipped with 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, by turning the key to ACC.
8. Place the transmission shift lever in PARK (P) for
an automatic transmission, or FIRST (1) for
vehicles equipped with a manual transmission.
9. Turn the ignition to LOCK.
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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 NEUTRAL (N) for an
automatic transmission, or press the clutch pedal for
vehicles equipped with a manual transmission.
Then turn the ignition to ON with the engine off.
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.
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 down the parking brake
pedal 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 3-32.
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{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).
Leaving Your Vehicle With the Engine
Running (Automatic Transmission)
{CAUTION:
It can be dangerous to leave your vehicle with
the engine running. Your vehicle could move
suddenly if the shift lever is not fully in
PARK (P) 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
your vehicle with the engine running.
If you have to leave your vehicle with the engine
running, be sure your vehicle is in PARK (P) and your
parking brake is rmly set before you leave it. After you
have moved the shift lever into PARK (P), hold the
regular brake pedal down. Then, see if you can move
the shift lever away from PARK (P) without rst pressing
the shift lever button. If you can, it means that the
shift lever was not fully locked into PARK (P).
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SERV (Service) 4WD
(Four-Wheel Drive)
This message will be displayed when there is a problem
with the transfer case control system. Check the
transfer case on your vehicle and have it serviced by
your GM dealer. SeeAll-Wheel Drive on page 2-22
for more information about the transfer case. Press and
release the reset stem to acknowledge the message
and clear it from the display.
SERVICE STAB (Stability)
SYS (System)
If your vehicle has StabiliTrak®, this message will be
displayed if there is a problem with the StabiliTrak®
system. You should have your vehicle serviced by your
GM dealer. SeeStabiliTrak®System (Automatic
Transmission) on page 4-11for more information.
SERV (Service) TPM
(Tire Pressure Monitor)
This message will be displayed if any of the tire monitor
sensors have malfunctioned, if the tire monitor sensors
have not been programmed, or if the recommended
tire pressures are not programmed. See your GM dealer
for service. Press and release the reset stem to
acknowledge the message and clear it from the display.
This message will appear at each ignition cycle until
the system is serviced. See your GM dealer.
SeeTire Pressure Monitor System on page 5-61for
more information.
SERV (Service) VEH (Vehicle)
This message will be displayed if your vehicle needs
service. You should have your vehicle serviced by your
GM dealer as soon as possible.
STAB (Stability) SYS (System) OFF
If your vehicle has StabiliTrak®, this message will be
displayed when the StabiliTrak®system is turned
off. SeeStabiliTrak®System (Automatic Transmission)
on page 4-11for more information.
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