2004 HUMMER H2 brake light

Passlock®
Your vehicle is equipped with the Passlock®
theft-deterrent system.
Passlock
®is a passive theft-deterrent system. Passlock®
enables fuel if the ignition lock cylinder is turned with
a valid key. If a correct key is not used or the ignition
lock cylinder is tampered with, the fuel system is
disabled and the vehicle will not start.
During normal operation, the security light will turn off
approximately ve seconds after the key is turned
to RUN.
If the engine stalls and the security light ashes, wait
about 10 minutes until the light stops ashing before
trying to restart the engine. Remember to release
the key from START as soon as the engine starts.
If the engine does not start after three tries, the vehicle
needs service.
If the engine is running and the security light comes on,
you will be able to restart the engine if you turn the engine
off. However, your Passlock
®system is not working
properly and must be serviced by your dealer. Your
vehicle is not protected by Passlock
®at this time. You
may also want to check the fuse. SeeFuses and Circuit
Breakers on page 5-102. See your dealer for service.
In an emergency, call the Roadside Assistance Center.
SeeRoadside Assistance Program on page 7-5.
Starting and Operating Your
Vehicle
New Vehicle Break-In
Notice:Your vehicle does not need an elaborate
“break-in.” But it will perform better in the long run
if you follow these guidelines:
Keep your speed at 55 mph (88 km/h) or less for
the rst 500 miles (805 km).
Do not drive at any one speed — fast or
slow — for the rst 500 miles (805 km). Do not
make full-throttle starts.
Avoid making hard stops for the rst 200 miles
(322 km) or so. During this time your new brake
linings are not yet broken in. Hard stops with new
linings can mean premature wear and earlier
replacement. Follow this breaking-in guideline
every time you get new brake linings.
Do not tow a trailer during break-in. SeeTowing a
Trailer on page 4-75for more information.
2-18

I(4LO Lock):This mode delivers extra torque to all
four wheels and is used for extreme off-road conditions.
You might choose 4LO Lock if you are driving off-road,
deep sand, mud, or snow and climbing or descending
steep hills.
When in this mode you can also choose to lock the rear
axle for additional traction in extreme off-road situations.
SeeLocking Rear Axle on page 4-11.
Notice:Operating your vehicle in 4LO Lock above
50 mph (80 km/h) for any extended period of time
could cause damage to the transfer case. Do
not operate your vehicle in 4LO Lock above 50 mph
(80 km/h) for extended periods.
{CAUTION:
Shifting the transfer case to NEUTRAL can
cause your vehicle to roll even if the
transmission is in PARK (P). You or someone
else could be seriously injured. Be sure to set
the parking brake before placing the transfer
case in NEUTRAL. SeeParking Brake on
page 2-29.N (NEUTRAL):Shift the vehicle’s transfer case to
NEUTRAL only when towing your vehicle. See
Recreational Vehicle Towing on page 4-65orTowing
Your Vehicle on page 4-65for more information.
Indicator lights in the buttons show which mode you are
in. The indicator lights will come on briey when you
turn on the ignition and one 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 illuminated 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 SERVICE 4WD message stays on, you should
take your vehicle to your dealer for service. See “Service
4WD message” underDriver Information Center (DIC)
on page 3-44.
2-26

If the 4HI or 4HI Lock button is pressed when your
vehicle is in gear and/or moving, the 4HI or 4HI Lock
indicator light will ash for 15 seconds but will not
complete the shift unless your vehicle is moving less
than 2 mph (3.2 km/h) and the transmission is in
NEUTRAL (N).
Notice:Shifting the transmission into gear before
the indicator light stops ashing could cause
damage to the transfer case. Always wait until the
indicator lights stops ashing before putting
the transmission back in gear.
Shifting into NEUTRAL
To shift the transfer case to NEUTRAL, do the following:
1. Make sure the vehicle is parked so that it will
not roll.
2. Set the parking brake.
3. Start the vehicle or turn the ignition to RUN.
4. Connect the vehicle to the towing vehicle.
5. Put the transmission in NEUTRAL (N).
6. Shift the transfer case to 4HI.
7. Simultaneously press and hold the 4HI and 4LO
Lock buttons for 10 seconds. The red NEUTRAL
light will come on when the transfer case shift
to NEUTRAL is complete.8. Turn the ignition to LOCK.
9. Place the transmission shift lever in PARK (P).
10. Release the parking brake prior to towing.
Shifting Out of NEUTRAL
To shift the transfer case out of NEUTRAL, do the
following:
1. Set the parking brake and apply the regular brake
pedal.
2. Shift the transmission to NEUTRAL (N) and turn the
ignition to RUN with the engine off.
3. Press the button for the desired transfer case shift
position (4HI, 4HI Lock or 4LO Lock).
4. After the transfer case has shifted out of NEUTRAL
the red light will go out.
5. You may start the engine and shift the transmission
to the desired position.
Notice:Shifting the transmission into gear before
the indicator light stops ashing could cause
damage to the transfer case. Always wait until the
indicator lights stops ashing before putting
the transmission back in gear.
2-28

Parking Brake
To set the parking brake, hold the regular brake pedal
down with your right foot. Push down the parking
brake pedal with your left foot.
A chime will activate and the warning light 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.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, 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 4-75.
2-29

{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.
Do not leave your vehicle when the engine is
running unless you have to. 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, always set your parking
brake and move the shift lever to PARK (P).
{CAUTION:
All-wheel drive vehicles with the transfer case
in NEUTRAL will allow the vehicle to roll, even
if your shift lever is in PARK (P). So, be sure
the transfer case is in a drive gear — not in
NEUTRAL. Always set your parking brake.Follow the proper steps to be sure your vehicle will not
move. SeeShifting Into Park (P) on page 2-30.
If you are pulling a trailer, seeTowing a Trailer on
page 4-75.
Mirrors
Automatic Dimming Rearview Mirror
with Compass and Temperature
Display
The automatic dimming mirror will automatically dim to
the proper level to minimize glare from lights behind
you after dark.
The mirror also includes a display in the upper right
corner of the mirror. The compass reading and
the outside temperature will both appear in the display
at the same time. The dual display can be turned
on or off by briey pressing either the TEMP or the
COMP button.
2-34

Instrument Panel Overview...............................3-2
Hazard Warning Flashers................................3-4
Other Warning Devices...................................3-5
Horn.............................................................3-5
Tilt Wheel.....................................................3-5
Turn Signal/Multifunction Lever.........................3-6
Exterior Lamps.............................................3-13
Interior Lamps..............................................3-16
Accessory Power Outlets...............................3-18
Ashtrays and Cigarette Lighter........................3-18
Climate Controls............................................3-19
Automatic Climate Control System...................3-19
Outlet Adjustment.........................................3-25
Climate Controls Personalization.....................3-25
Warning Lights, Gages, and Indicators............3-26
Instrument Panel Cluster................................3-27
Speedometer and Odometer...........................3-28
Tachometer.................................................3-28
Safety Belt Reminder Light.............................3-28
Air Bag Readiness Light................................3-28
Air Bag Off Light..........................................3-30
Charging System Light..................................3-32
Voltmeter Gage............................................3-32
Brake System Warning Light..........................3-33
Anti-Lock Brake System Warning Light.............3-34
Traction Off Light..........................................3-35Engine Coolant Temperature Gage..................3-35
Transmission Temperature Gage.....................3-36
Malfunction Indicator Lamp.............................3-38
Oil Pressure Gage........................................3-41
Security Light...............................................3-42
Cruise Control Light......................................3-42
Tow/Haul Mode Light....................................3-42
Fuel Gage...................................................3-43
Low Fuel Warning Light.................................3-43
Driver Information Center (DIC).......................3-44
DIC Operation and Displays...........................3-44
DIC Warnings and Messages.........................3-56
Audio System(s).............................................3-62
Setting the Time...........................................3-62
Radio with Cassette and CD..........................3-63
Radio with Six-Disc CD.................................3-74
Navigation/Radio System...............................3-86
Rear Seat Audio (RSA).................................3-87
Theft-Deterrent Feature..................................3-88
Audio Steering Wheel Controls.......................3-89
Radio Reception...........................................3-90
Care of Your Cassette Tape Player.................3-90
Care of Your CDs and DVDs.........................3-92
Care of Your CD and DVD Player...................3-92
Fixed Mast Antenna......................................3-92
Chime Level Adjustment................................3-92
Section 3 Instrument Panel
3-1

The main components of your instrument panel are the
following:
A. Air Outlets. SeeOutlet Adjustment on page 3-25.
B. Exterior Lamps Control. SeeExterior Lamps
on page 3-13.
C. OnStar
®and Radio Steering Wheel Buttons (If
Equipped). SeeOnStar®System on page 2-40and
Audio Steering Wheel Controls on page 3-89.
D. Instrument Panel Cluster. SeeInstrument Panel
Cluster on page 3-27.
E. Locking Rear Axle and All-wheel Drive Buttons. See
Locking Rear Axle on page 4-11andAll-Wheel
Drive on page 2-25.
F. Audio System. SeeAudio System(s) on page 3-62.
G. Air Bag Switch. SeeAir Bag Off Switch on
page 1-68.
H. Glove Box. SeeGlove Box on page 2-45.
I. Rear Wiper/Washer Control. See “Rear Window
Washer/Wiper” underTurn Signal/Multifunction Lever
on page 3-6.
J. Dome Override Button. SeeInterior Lamps on
page 3-16.
K. Turn Signal/Multifunction Lever. SeeTurn
Signal/Multifunction Lever on page 3-6.L. Tilt Lever. SeeTilt Wheel on page 3-5.
M. Driver Information Center (DIC) Buttons. SeeDriver
Information Center (DIC) on page 3-44.
N. Parking Brake Release. SeeParking Brake on
page 2-29.
O. Traction Control Button. SeeTraction Control
System (TCS) on page 4-9.
P. Tow/Haul Selector Button. See “Tow/Haul Mode”
underAutomatic Transmission Operation on
page 2-22.
Q. Ride Height Selector Button (If Equipped). See
Selectable Extended Rear Ride Height on page 4-73.
R. Cigarette Lighter (If Equipped). SeeAshtrays and
Cigarette Lighter on page 3-18.
S. Shift Lever. SeeAutomatic Transmission Operation
on page 2-22.
T. Accessory Power Outlets (If Equipped). See
Accessory Power Outlets on page 3-18.
U. OnStar Buttons. SeeOnStar
®System on page 2-40.
V. Rear Window Defogger Button. See “Rear Window
Defogger” underAutomatic Climate Control
System on page 3-19.
W. Comfort Control System. SeeAutomatic Climate
Control System on page 3-19.
3-3

Reducing Speed While Using Cruise
Control

Press in the button at the end of the lever until you
reach the lower speed you want, then release it.
To slow down in very small amounts, briey press
the set button. Each time you do this, you’ll 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 will
slow down to the cruise control speed you set earlier.
Using Cruise Control on Hills
How well your cruise control will work on hills depends
upon your speed, load and the steepness of the
hills. When going up steep hills, you may want to step
on the accelerator pedal to maintain your speed.
When going downhill, you may have to brake or shift to
a lower gear to keep your speed down. Of course,
applying the brake takes you out of cruise control. Many
drivers nd this to be too much trouble and don’t use
cruise control on steep hills.
Ending Cruise Control
There are four ways to turn off the cruise control:
Step lightly on the brake pedal,
move the cruise control switch to off, or
shift the transmission to NEUTRAL (N).
If road conditions cause the traction control system
to activate, cruise control will turn off.
If the accelerator pedal is held for 60 seconds or
longer, cruise control will turn off.
Erasing Speed Memory
When you turn off the cruise control or the ignition, your
cruise control set speed memory is erased.
3-12