ABS HUMMER H2 2004 Owners Manual

Adjusting the Crossrails
Adjust the crossrails to t your load by doing the
following:
1. Loosen the lock knobs on the crossrail supports by
turning the knobs counterclockwise. Only loosen
them enough to allow the crossrails to slide easily.
2. Slide the crossrails to the desired position, being
sure to align the lines in the side rails with the
arrows on the crossrail supports.
3. Tighten the lock knobs and then try to move the
crossrails back and forth to be sure that they do
not move.4. Once you load the cargo onto the crossrails, secure
it by tying it down to the crossrail support cargo
tie-down loops. Do not load cargo directly on
the roof of your vehicle.
Be sure you do not cover the roof marker lamps or
the Center-High-Mounted Stoplamp (CHMSL) (If
equipped) with cargo.
To prevent damage or loss of cargo check now and
then to make sure the luggage and cargo are still
securely fastened and the crossrails are tight.
Stop Tabs
2-47

If your vehicle has a sunroof, it will have a crossrail stop
tab placed in the siderail in the spot labeled SUN—ROOF
STOP. This tab prevents you from moving the crossrails
past the opening of the sunroof and loading cargo too far
forward.
Your vehicle will also have a stop tab in the crossrail in
the spot labeled ON STAR STOP. This tab prevents
loading cargo too close to the OnStar antenna which will
cause the OnStar and navigation system (if equipped)
to function improperly or not at all.
Vehicles with the off-road lamps will have additional
stop tabs placed in the siderails to prevent you
from moving the lamps too far rearward, causing them
to shine into the optional sunroof opening.
Crossrail Channels
Notice:If you drive your vehicle through an
automatic car wash that does not have enough
clearance for any roof-mounted accessories (such
as off-road lamps or a roof basket) on your vehicle,
you can damage your vehicle. To avoid damaging
your vehicle in a car wash, remove any
roof-mounted accessories if you can, and do not
use an automatic car wash while roof-mounted
accessories are on your vehicle. SeeCleaning the
Outside of Your Vehicle on page 5-95for more
information.The crossrails have built in channels to allow you to
attach other items designed for this system, such
as basket luggage carriers, bike racks, ski racks, etc.
To use the crossrail channels, do the following:
1. Use the included key to unlock the crossrail end
cap by turning it counterclockwise. If you ever
loose a key, your dealer will be able to help you
obtain a replacement.
2-48

Avoid needless heavy braking. Some people drive
in spurts — heavy acceleration followed by heavy
braking — rather than keeping pace with traffic. This is
a mistake. Your brakes may not have time to cool
between hard stops. Your brakes will wear out much
faster if you do a lot of heavy braking. If you keep pace
with the traffic and allow realistic following distances,
you will eliminate a lot of unnecessary braking.
That means better braking and longer brake life.
If your engine ever stops while you are driving, brake
normally but do not pump your brakes. If you do,
the pedal may get harder to push down. If your engine
stops, you will still have some power brake assist.
But you will use it when you brake. Once the power
assist is used up, it may take longer to stop and
the brake pedal will be harder to push.Anti-lock Brake System (ABS)
Your vehicle has anti-lock brakes. ABS is an advanced
electronic braking system that will help prevent a
braking skid.
When you start your engine and begin to drive away,
your anti-lock brake system will check itself. You
may hear a momentary motor or clicking noise while
this test is going on. This is normal.
If there is a problem with
the anti-lock brake system,
this warning light will
stay on. SeeAnti-Lock
Brake System Warning
Light on page 3-34.
4-7

Let us say the road is wet and you are driving safely.
Suddenly, an animal jumps out in front of you. You slam
on the brakes and continue braking. Here is what
happens with ABS:
A computer senses that wheels are slowing down. If
one of the wheels is about to stop rolling, the computer
will separately work the brakes at each front wheel
and at both rear wheels.The anti-lock system can change the brake pressure
faster than any driver could. The computer is
programmed to make the most of available tire and road
conditions. This can help you steer around the obstacle
while braking hard.
As you brake, your computer keeps receiving updates
on wheel speed and controls braking pressure
accordingly.
4-8

Loss of Control
Let us review what driving experts say about what
happens when the three control systems (brakes,
steering and acceleration) do not have enough friction
where the tires meet the road to do what the driver
has asked.
In any emergency, do not give up. Keep trying to
steer and constantly seek an escape route or area of
less danger.
Skidding
In a skid, a driver can lose control of the vehicle.
Defensive drivers avoid most skids by taking reasonable
care suited to existing conditions, and by not
“overdriving” those conditions. But skids are always
possible.
The three types of skids correspond to your vehicle’s
three control systems. In the braking skid, your wheels
are not rolling. In the steering or cornering skid, too
much speed or steering in a curve causes tires to slip
and lose cornering force. And in the acceleration
skid, too much throttle causes the driving wheels
to spin.
A cornering skid is best handled by easing your foot off
the accelerator pedal.If your vehicle starts to slide, ease your foot off the
accelerator pedal and quickly steer the way you want
the vehicle to go. If you start steering quickly enough,
your vehicle may straighten out. Always be ready
for a second skid if it occurs.
Of course, traction is reduced when water, snow, ice,
gravel or other material is on the road. For safety,
you will want to slow down and adjust your driving to
these conditions. It is important to slow down on slippery
surfaces because stopping distance will be longer and
vehicle control more limited.
While driving on a surface with reduced traction, try
your best to avoid sudden steering, acceleration
or braking (including engine braking by shifting to a
lower gear). Any sudden changes could cause the tires
to slide. You may not realize the surface is slippery
until your vehicle is skidding. Learn to recognize warning
clues — such as enough water, ice or packed snow
on the road to make a “mirrored surface” — and slow
down when you have any doubt.
Remember: Any anti-lock brake system (ABS) helps
avoid only the braking skid.
4-16

Driving On Grades
Reduce speed and shift to a lower gearbeforeyou start
down a long or steep downgrade. If you don’t shift
down, you might have to use your brakes so much that
they would get hot and no longer work well.
You can tow in DRIVE (D). You may want to shift the
transmission to THIRD (3) or, if necessary, a lower gear
selection if the transmission shifts too often (e.g.,
under heavy loads and/or hilly conditions).
You may also want to activate the tow/haul mode if the
transmission shifts too often. See “Tow/Haul Mode”
earlier.
When towing at high altitude on steep uphill grades,
consider the following: Engine coolant will boil at a lower
temperature than at normal altitudes. If you turn your
engine off immediately after towing at high altitude
on steep uphill grades, your vehicle may show signs
similar to engine overheating. To avoid this, let the
engine run while parked (preferably on level ground)
with the automatic transmission in PARK (P) for a
few minutes before turning the engine off. If you do get
the overheat warning, seeEngine Overheating on
page 5-27.
Parking on Hills
{CAUTION:
You really should not park your vehicle, with a
trailer attached, on a hill. If something goes
wrong, your rig could start to move. People
can be injured, and both your vehicle and the
trailer can be damaged.
But if you ever have to park your rig on a hill, here’s
how to do it:
1. Apply your regular brakes, but don’t shift into
PARK (P) yet.
2. Have someone place chocks under the trailer
wheels.
3. When the wheel chocks are in place, release the
regular brakes until the chocks absorb the load.
4. Reapply the regular brakes. Then apply your
parking brake and shift into PARK (P).
5. Release the regular brakes.
4-83

Fuses Usage
GLOW PLUG Not Used
CUST FEED Gasoline Accessory Power
STUD #1Accessory Power/Trailer
Wiring
MBEC 1Mid Bussed Electrical Center
Power Feed, Front Seats,
Right Doors
BLOWER Front Climate Control Fan
LBEC 2Left Bussed Electrical Center,
Door Modules, Door Locks,
Auxiliary Power Outlet—Rear
Cargo Area and Instrument
Panel
STUD #2Accessory Power/Trailer
Wiring Brake Feed
ABS Anti-Lock Brakes
VSES/ECASElectronically Controlled Air
Suspension
IGN A Ignition Switch
IGN B Ignition SwitchFuses Usage
LBEC 1Left Bussed Electrical Center,
Left Doors, Truck Body
Controller, Flasher Module
TRL PARK Parking Lamps Trailer Wiring
RR PARKRight Rear Parking and
Sidemarker Lamps
LR PARKLeft Rear Parking and
Sidemarker Lamps
PARK LP Parking Lamps Relay
STARTER Starter Relay
INTPARK Roof Marker Lamps
STOP LP Stoplamps
TBC BATTTruck Body Controller Battery
Feed
SUNROOF Sunroof
SEO B2 Off-Road Lamps
4WS Vent Solenoid Canister
RR HVAC Not Used
AUX PWRAuxiliary Power Outlet —
Console
5-108

A
Accessory Inator...........................................5-76
Accessory Power Outlets.................................3-18
Adding Equipment to Your Air Bag-Equipped
Vehicle.......................................................1-73
Adding Washer Fluid.......................................5-37
Additional Program Information........................... 7-8
Additives, Fuel................................................. 5-6
Add-On Electrical Equipment...........................5-101
Add-On Equipment..........................................4-72
Adjusting the Speakers (Balance/Fade)......3-65, 3-77
After Off-Road Driving.....................................4-41
Air Bag
Off Light.....................................................3-30
Readiness Light..........................................3-28
Air Bag System..............................................1-61
Adding Equipment to Your Air Bag-Equipped
Vehicle...................................................1-73
Air Bag Off Switch.......................................1-68
How Does an Air Bag Restrain?....................1-65
Servicing Your Air Bag-Equipped Vehicle.........1-72
What Makes an Air Bag Inate?....................1-65
What Will You See After an Air Bag Inates?......1-66
When Should an Air Bag Inate?...................1-65
Where Are the Air Bags?..............................1-63
Air Cleaner/Filter, Engine.................................5-19
Air Conditioning..............................................3-23
Air Suspension...............................................4-74
Airbag Sensing and Diagnostic Module (SDM)...... 7-9All-Wheel Drive...............................................5-48
All-Wheel Drive (AWD) System.........................2-25
AM ...............................................................3-90
Antenna, Fixed Mast.......................................3-92
Anti-lock Brake System (ABS)............................ 4-7
Anti-Lock Brake, System Warning Light..............3-34
Appearance Care............................................5-92
Care of Safety Belts....................................5-95
Chemical Paint Spotting...............................5-99
Cleaning the Inside of Your Vehicle................5-93
Cleaning the Outside of Your Vehicle..............5-95
Finish Damage............................................5-99
Sheet Metal Damage...................................5-98
Underbody Maintenance...............................5-99
Vehicle Care/Appearance Materials...............5-100
Weatherstrips..............................................5-95
Approaching a Hill..........................................4-32
Ashtrays........................................................3-18
Audio System(s).............................................3-62
Audio Steering Wheel Controls......................3-89
Care of Your Cassette Tape Player................3-90
Care of Your CD Player...............................3-92
Care of Your CDs........................................3-92
Chime Level Adjustment...............................3-92
Fixed Mast Antenna.....................................3-92
Navigation/Radio System..............................3-86
Radio with Cassette and CD.........................3-63
Radio with Six-Disc CD................................3-74
Rear Seat Audio (RSA)................................3-87
Setting the Time..........................................3-62
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