transmission HUMMER H3 2008 Owner's Manual

Instrument Panel Overview
Automatic Transmission shown, Manual Transmission similar
3-4

The main components of your instrument panel are the following:
A. Air Outlets. SeeOutlet Adjustment on page 3-24.
B. Turn Signal/Multifunction Lever. SeeTurn Signal/
Multifunction Lever on page 3-7. Windshield
Washer/Wiper. SeeWindshield Wipers on page 3-10
andWindshield Washer on page 3-10. Cruise
Controls. SeeCruise Control on page 3-11.
C. Horn. SeeHorn on page 3-6.
D. Instrument Panel Cluster. SeeInstrument Panel
Cluster on page 3-26.
E. Hazard Warning Flasher Button. SeeHazard
Warning Flashers on page 3-6.
F. All-Wheel Drive, Passenger Air Bag Status Indicator,
Locking Rear Axle, and Traction Control System/
StabiliTrak
®Buttons. SeeFull-Time Four-Wheel
Drive on page 2-27,Passenger Airbag Status
Indicator on page 3-30,Locking Rear Axle on
page 4-6,Traction Control System (TCS) on
page 4-5andStabiliTrak
®System on page 4-7.
G. Exterior Lamps Control, Dome Override Button,
Instrument Panel Brightness Control, Fog Lamp
Button, and OnStar
®Button. SeeExterior Lamps on
page 3-15,Dome Lamp Override on page 3-20,
Instrument Panel Brightness on page 3-19,
Fog Lamps on page 3-19, andOnStar
®System on
page 2-48.H. Parking Brake Release. SeeParking Brake on
page 2-32.
I. Audio System. SeeAudio System(s) on page 3-48.
J. Climate Control System. SeeClimate Control
System on page 3-22.
K. Rear Washer/Wiper Control. SeeRear Window
Wiper/Washer on page 3-11.
L. Off-Road Lamps Buttons. SeeOff-Road Lamps on
page 3-18.
M. Shift Lever. SeeAutomatic Transmission Operation
on page 2-23orManual Transmission Operation
on page 2-26.
N. Accessory Power Outlets. SeeAccessory Power
Outlet(s) on page 3-21.
O. Glove Box. SeeGlove Box on page 2-56.
3-5

Reducing Speed While Using Cruise
Control

Press and hold the set button until you reach the
desired lower speed, then release it.
To slow down in very small amounts, briey press
the set button. Each time you do this, you will go
about 1 mph (1.6 km/h) slower.
Passing Another Vehicle While Using
Cruise Control
Use the accelerator pedal to increase your speed.
When you take your foot off the pedal, your vehicle
slows down to the cruise control speed you set earlier.
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.
3-14

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.
O(Off):Turn the knob to this position to turn off all
exterior lamps, including the Daytime Running
Lamps (DRL). This is a momentary control that springs
back to AUTO when released. Vehicles rst sold in
Canada do not have the DRL disable feature available.Vehicles rst sold in Canada cannot turn off the DRL
unless the following conditions are met:
The vehicle has an automatic transmission.
The gear position is in PARK (P).
The headlamp switch is turned to the Off position.
AUTO (Automatic):Turn the knob to this position
to automatically turn on the headlamps at normal
brightness, together with the following:
Sidemarker Lamps
Taillamps
Parking Lamps
Instrument Panel Lights
Due to the momentary switch design, the automatic
headlamps may be disabled even if the control is in the
AUTO position.
To enable automatic lighting, do any of the following:
Turn the headlamp control from AUTO to off
and release the control. It will return back to
the AUTO position by itself.
Turn the headlamp control from the parking lamp or
headlamp position to AUTO.
3-15

To disable automatic lighting, do any of the following:
Turn the headlamp control from AUTO to off
and release the control. It will return back to
the AUTO position by itself.
Turn the headlamp control from AUTO to the
parking lamp or headlamp position.
SeeAutomatic Headlamp System on page 3-17for
more information.
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.
The headlamps can be switched 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.
3-16

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.
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 3-15.Vehicles rst sold in Canada cannot turn off DRL unless
certain conditions are met. SeeExterior Lamps on
page 3-15.
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.
3-17

Instrument Panel Cluster
Your instrument panel cluster is designed to let you know at a glance how your vehicle is running. You will know how
fast you are going, about how much fuel you have used, and many other things you will need to know to drive
safely and economically.
United States 3.7L L5 Automatic Transmission version shown, 5.3L V8, Canada and Manual
Transmission similar
3-26

Charging System Light
This light will come on
briey when you turn on
the ignition, but the engine
is not running, as a
check to show you it
is working.
It should go out once the engine is running. If it stays
on, or comes on while you are driving, you may have a
problem with the charging system. A charging system
Driver Information Center (DIC) message may also
appear. SeeDIC Warnings and Messages on page 3-43
for more information. This light could indicate that you
have problems with a generator drive belt, or another
electrical problem. Have it checked right away. If
you must drive a short distance with the light on, be
certain to turn off all your accessories, such as the radio
and air conditioner.
Up-Shift Light
Your vehicle may have an
up-shift light.
When this light comes on, you should shift to the next
higher gear if weather, road, and traffic conditions allow
you to.
SeeManual Transmission Operation on page 2-26for
more information.
3-32

Malfunction Indicator Lamp
Check Engine Light
A computer system called OBD II (On-Board
Diagnostics-Second Generation) monitors operation of
the fuel, ignition, and emission control systems. It makes
sure that emissions are at acceptable levels for the
life of the vehicle, helping to produce a cleaner
environment.
The check engine light
comes on to indicate
that there is an OBD II
problem and service
is required.
Malfunctions often are indicated by the system before
any problem is apparent. This can prevent more serious
damage to your vehicle. This system is also designed
to assist your service technician in correctly diagnosing
any malfunction.
Notice:If you keep driving your vehicle with this
light on, after a while, the emission controls might
not work as well, your vehicle’s fuel economy might
not be as good, and the engine might not run as
smoothly. This could lead to costly repairs that might
not be covered by your warranty.Notice:Modications made to the engine,
transmission, exhaust, intake, or fuel system of
your vehicle or the replacement of the original tires
with other than those of the same Tire Performance
Criteria (TPC) can affect your vehicle’s emission
controls and can cause this light to come on.
Modications to these systems could lead to costly
repairs not covered by your warranty. This could
also result in a failure to pass a required Emission
Inspection/Maintenance test. SeeAccessories
and Modifications on page 5-3.
This light comes on, as a check to show it is working,
when the ignition is turned ON/RUN but the engine is not
running. If the light does not come on, have it repaired.
This light also comes on during a malfunction in
one of two ways:
Light Flashing— A misre condition has been
detected. A misre increases vehicle emissions
and could damage the emission control system on
your vehicle. Diagnosis and service might be
required.
Light On Steady— An emission control system
malfunction has been detected on your vehicle.
Diagnosis and service might be required.
3-36

Automatic Door Locks
This feature allows you to program the door locks to a
preferred setting.
To set your choice for this feature:
1. With the engine off, turn the key to LOCK/OFF.
Do not remove the key from the ignition.
2. Press and hold the power door lock button until the
DIC display shows the current door lock mode.
3. To view the next available mode, press and hold
the reset stem until the mode appears. Release
the reset stem and press and hold again to view the
next mode.
4. Once the desired mode is shown on the DIC
display, briey press the reset stem to set your
choice. The DIC display then clears.
The following are the available modes:
Lock 1 (default):On vehicles with an automatic
transmission, this mode locks all of the doors when the
vehicle is shifted out of PARK (P) and unlocks all of
the doors when the vehicle is shifted into PARK (P).
On vehicles with a manual transmission, this mode locks
all of the doors when the vehicle speed is greater
than 15 mph (24 km/h) and unlocks all of the doors
when the key is removed from the ignition.Lock 2:On vehicles with an automatic transmission,
this mode locks all of the doors when the vehicle
is shifted out of PARK (P) and unlocks the driver’s door
when the vehicle is shifted into PARK (P).
On vehicles with a manual transmission, this mode
locks all of the doors when the vehicle speed is greater
than 15 mph (24 km/h) and unlocks the driver’s door
when the key is removed from the ignition.
Lock 3:On vehicles with an automatic transmission,
this mode locks all of the doors when the vehicle
is shifted out of PARK (P). The doors will not
automatically unlock.
On vehicles with a manual transmission, this mode
locks all of the doors when the vehicle speed is greater
than 15 mph (24 km/h). The doors will not automatically
unlock.
Remote Keyless Entry (RKE) Feedback
This feature allows you to program the Remote
Keyless Entry (RKE) feedback to a preferred setting.
To set your choice for this feature:
1. With the engine off, turn the key to LOCK/OFF.
Do not remove the key from the ignition.
2. Press and hold the lock and unlock buttons on the
RKE transmitter at the same time. Hold both
buttons until the DIC display shows the current RKE
feedback mode.
3-42