height HUMMER H2 2004 Owners Manual

{CAUTION:
Children who are up against, or very close to,
any air bag when it inates can be seriously
injured or killed. Air bags plus lap-shoulder
belts offer outstanding protection for adults
and older children, but not for young children
and infants. Neither the vehicle’s safety belt
system nor its air bag system is designed for
them. Young children and infants need the
protection that a child restraint system can
provide.
Q:What are the different types of add-on child
restraints?
A:Add-on child restraints, which are purchased by
the vehicle’s owner, are available in four basic
types. Selection of a particular restraint should take
into consideration not only the child’s weight,
height, and age but also whether or not the
restraint will be compatible with the motor vehicle
in which it will be used.
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For most basic types of child restraints, there are
many different models available. When purchasing a
child restraint, be sure it is designed to be used
in a motor vehicle. If it is, the restraint will have a
label saying that it meets federal motor vehicle
safety standards.
The restraint manufacturer’s instructions that come
with the restraint state the weight and height
limitations for a particular child restraint. In addition,
there are many kinds of restraints available for
children with special needs.
{CAUTION:
Newborn infants need complete support,
including support for the head and neck. This
is necessary because a newborn infant’s neck
is weak and its head weighs so much
compared with the rest of its body. In a crash,
an infant in a rear-facing seat settles into the
restraint, so the crash forces can be
distributed across the strongest part of an
infant’s body, the back and shoulders. Infants
always should be secured in appropriate infant
restraints.
{CAUTION:
The body structure of a young child is quite
unlike that of an adult or older child, for whom
the safety belts are designed. A young child’s
hip bones are still so small that the vehicle’s
regular safety belt may not remain low on the
hip bones, as it should. Instead, it may settle
up around the child’s abdomen. In a crash, the
belt would apply force on a body area that’s
unprotected by any bony structure. This alone
could cause serious or fatal injuries. Young
children always should be secured in
appropriate child restraints.
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Adding Equipment to Your Air
Bag-Equipped Vehicle
Q:Is there anything I might add to the front of the
vehicle that could keep the air bags from
working properly?
A:Yes. If you add things that change your vehicle’s
frame, bumper system, front end sheet metal or
height, they may keep the air bag system
from working properly. Also, the air bag system
may not work properly if you relocate any of the air
bag sensors. If you have any questions about
this, you should contact Customer Assistance
before you modify your vehicle. The phone
numbers and addresses for Customer Assistance
are in Step Two of theCustomer Satisfaction
Procedure on page 7-2.
Restraint System Check
Checking Your Restraint Systems
Now and then, make sure the safety belt reminder light
and all your belts, buckles, latch plates, retractors
and anchorages are working properly. Look for any other
loose or damaged safety belt system parts. If you see
anything that might keep a safety belt system from doing
its job, have it repaired.
Torn or frayed safety belts may not protect you in a
crash. They can rip apart under impact forces. If a belt
is torn or frayed, get a new one right away.
Also look for any opened or broken air bag covers, and
have them repaired or replaced. (The air bag system
does not need regular maintenance.)
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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

Your Driving, the Road, and Your Vehicle..........4-2
Defensive Driving...........................................4-2
Drunken Driving.............................................4-3
Control of a Vehicle........................................4-6
Braking.........................................................4-6
Traction Control System (TCS).........................4-9
Locking Rear Axle........................................4-11
Steering......................................................4-12
Off-Road Recovery.......................................4-14
Passing.......................................................4-14
Loss of Control.............................................4-16
Off-Road Driving...........................................4-17
Driving at Night............................................4-41
Driving in Rain and on Wet Roads..................4-43
City Driving..................................................4-46
Freeway Driving...........................................4-47Before Leaving on a Long Trip.......................4-48
Highway Hypnosis........................................4-49
Hill and Mountain Roads................................4-50
Winter Driving..............................................4-52
If You Are Stuck: In Sand, Mud, Ice or Snow . . .4-56
Towing..........................................................4-65
Towing Your Vehicle.....................................4-65
Recreational Vehicle Towing...........................4-65
Loading Your Vehicle....................................4-67
Selectable Extended Rear Ride Height.............4-73
Electronically Controlled Air Suspension
System....................................................4-74
Trailer Recommendations...............................4-75
Towing a Trailer...........................................4-75
Section 4 Driving Your Vehicle
4-1

Selectable Extended Rear Ride
Height
If your vehicle has this feature it comes as part of the
electronically controlled air suspension system.
The selectable rear ride height allows you to raise the
rear of the vehicle about 2 inches (5 cm) over the normal
ride height. This can be helpful when driving off-road
where you may need more ground clearance to clear
an obstacle.
The button that controls
this feature is located on
the instrument panel to the
right of the steering wheel.To use this feature, ensure that the following conditions
are met:
The engine must be running.
All doors must be fully closed. The suspension will
not raise or lower if a door is open.
The vehicle speed must be less than 40 mph
(64 km/h). The system will not activate otherwise.
Press the height control button to raise the rear of the
vehicle.
A light in the button will begin to ash as the rear of the
vehicle rises. Once the extended height has been
reached (this may take up to a minute), the warning
light will stop ashing and will stay lit while the vehicle is
at the extended height.
To lower the vehicle to the normal ride height, press the
button again. The light in the button will ash as the
suspension lowers. When the light in the button stops
ashing and goes out, the suspension has reached
the normal ride height.
This feature will lower the vehicle to the normal height if
vehicle speed exceeds 40 mph (64 km/h).
You may also want to use this feature when ascending,
descending or cresting a steep hill as this can help
prevent the rear bumper from dragging on the base of
the hill or prevent the vehicle from grounding out
(high centering) on the crest of the hill.
Do not use this feature when towing a trailer.
4-73

Electronically Controlled Air
Suspension System
The electronically controlled air suspension, if equipped,
keeps the rear of your vehicle level as you load and
unload it. The system includes a compressor, two height
sensor and two air springs supporting the vehicle.
The engine must be running for the system to operate
and level the vehicle after loading or unloading. The
system will suspend leveling if any of the doors and/or
the liftgate are open. Once the doors are closed,
system leveling will continue.
You may hear the compressor running when you load
your vehicle, and periodically as the system adjusts
the vehicle to the standard ride height. You may
also hear the release of air similar to a hissing sound
during suspension operation. This is normal.
Load leveling will not function normally with the inator
hose attached to the inator outlet. Remove the
inater hose from the outlet when it is not in use. See
Accessory Inator on page 5-76.
Overload and Overheat Protection
Overload protection is designed to protect the air
suspension system and is an indication to the driver that
the vehicle is overloaded.
If the rear suspension remains at a low height, the rear
axle load has exceeded GAWR (Gross Axle Weight
Rating). When the overload protection mode is activated,
the compressor operates for about 30 seconds to one
minute without raising the vehicle depending on the
amount of overload. This will continue each time
the ignition is turned on until the rear axle load is
reduced below GAWR.
If the total rear GAWR (Gross Axle Weight Rating) is
reached, the suspension may be slightly less than level.
This is normal and does not mean there is a problem
with the air suspension.
If the system overheats, it will shut down and stop all
leveling functions until the system cools down.
During this time the SERVICE AIR SUSPENSION
message will appear in the DIC. SeeDriver Information
Center (DIC) on page 3-44for more information.
4-74

Brake Pedal Travel
See your dealer if the brake pedal does not return to
normal height, or if there is a rapid increase in
pedal travel. This could be a sign of brake trouble.
Brake Adjustment
Every time you make a brake stop, your disc brakes
adjust for wear.
Replacing Brake System Parts
The braking system on a vehicle is complex. Its many
parts have to be of top quality and work well together if
the vehicle is to have really good braking. Your
vehicle was designed and tested with top-quality GM
brake parts. When you replace parts of your braking
system — for example, when your brake linings
wear down and you need new ones put in — be sure
you get new approved GM replacement parts. If you do
not, your brakes may no longer work properly. For
example, if someone puts in brake linings that are wrong
for your vehicle, the balance between your front and
rear brakes can change — for the worse. The braking
performance you have come to expect can change
in many other ways if someone puts in the wrong
replacement brake parts.
Battery
Your new vehicle comes with a maintenance free
ACDelco®battery. When it is time for a new battery, get
one that has the replacement number shown on the
original battery’s label. We recommend an ACDelco
®
battery. SeeEngine Compartment Overview on
page 5-12for battery location.
Warning:Battery posts, terminals and related
accessories contain lead and lead compounds,
chemicals known to the State of California to cause
cancer and reproductive harm. Wash hands after
handling.
Vehicle Storage
If you are not going to drive your vehicle for 25 days or
more, remove the black, negative (−) cable from the
battery. This will help keep your battery from
running down.
5-42

(A) Tire Size Code:The tire size code is a combination
of letters and numbers used to dene a particular
tire’s width, height, aspect ratio, construction type and
service description. See the “Tire Size Code” illustration
later in this section for more detail.
(B) Tire Performance Criteria Specication
(TPC Spec):Original equipment tires designed to GM’s
specic tire performance criteria have a TPC
specication code molded onto the sidewall. GM’s TPC
specications meet or exceed all federal safety
guidelines.
(C) Department of Transportation (DOT):The
Department of Transportation (DOT) code indicates that
the tire is in compliance with the U.S. Department of
Transportation Motor Vehicle Safety Standards.
(D) Tire Identication Number (TIN):The letters and
numbers following DOT code are the Tire Identication
Number (TIN). The TIN shows the manufacturer
and plant code, tire size, and date the tire was
manufactured. The TIN is molded onto both sides of the
tire, although only one side may have the date of
manufacture.
(E) Tire Ply Material:The type of cord and number of
plies in the sidewall and under the tread.
P-Metric Tire
5-61

(A) Tire Size:The tire size code is a combination of
letters and numbers used to dene a particular
tire’s width, height, aspect ratio, construction type and
service description. See the “Tire Size” illustration
later in this section for more detail.
(B) Tire Performance Criteria Specication
(TPC Spec):Original equipment tires designed to GM’s
specic tire performance criteria have a TPC
specication code molded onto the sidewall. GM’s TPC
specications meet or exceed all federal safety
guidelines.
(C) Dual Tire Maximum Load:Maximum load that can
be carried and the maximum pressure needed to
support that load when used in a dual conguration. For
information on recommended tire pressure see
Ination - Tire Pressure on page 5-68andLoading Your
Vehicle on page 4-67.
(D) Department of Transportation (DOT):The
Department of Transportation (DOT) code indicates that
the tire is in compliance with the U.S. Department of
Transportation Motor Vehicle Safety Standards.(E) Tire Identication Number (TIN):The letters and
numbers following DOT code are the Tire Identication
Number (TIN). The TIN shows the manufacturer
and plant code, tire size, and date the tire was
manufactured. The TIN is molded onto both sides of the
tire, although only one side may have the date of
manufacture.
(F) Tire Ply Material:The type of cord and number of
plies in the sidewall and under the tread.
(G) Single Tire Maximum Load:Maximum load that
can be carried and the maximum pressure needed
to support that load when used as a single. For
information on recommended tire pressure seeInation
- Tire Pressure on page 5-68andLoading Your
Vehicle on page 4-67.
5-63