roof HUMMER H2 2008 User Guide

Luggage Carrier
If your vehicle has this feature, you can load cargo on
your vehicle.
The luggage carrier consists of siderails attached to the
roof. The crossrails attach into the siderails and can
be moved back and forth to accommodate securing
various cargo sizes.
See your dealer/retailer for more information.
Notice:Loading cargo on the luggage carrier that
weighs more than 300 lbs. (136 kg) or hangs over the
rear or sides of the vehicle may damage your vehicle.
Load cargo only on top of the crossrails and tie the
cargo down to the crossrail support cargo tie-down
loops, making sure to fasten it securely.
Do not exceed the maximum vehicle capacity when
loading your vehicle. For more information on vehicle
capacity and loading, seeLoading Your Vehicle on
page 4-44.
Rear Seat Armrest
Your vehicle has a rear seat armrest with cupholders.
To access, pull the tab on the armrest forward.
Cargo Tie Downs (SUT)
There are four oval shaped openings (A) in the cargo
bed that allow access to four tie downs. You can
use these tie downs to secure cargo.
2-65

All-Weather Cargo Area (SUT)
Your vehicle has features to help it resist the elements
and protect cargo inside the cargo area.
Even when the water management system is working
properly and the cover system is on, there may be some
instances (heavy rains, automated car washes, etc.)
when water may be present in the drain holes.
See “Cargo Area Floor Drains” later in this section for
more information.
Removal and Cleaning
To ensure that the water management system performs
properly, be sure that the midgate, tailgate and cover
system are fully closed and that each element of
the water management system is clean and not blocked
with debris. Follow the instruction given next in this
section for the proper procedures on cleaning each item
of the water management system.
Side Rail Channels
The side rail channels are located on top of both sides
of the roof and the cargo area. You may want to
ush them out with clean water if you notice any debris
collecting inside of them.
When loading cargo into the cargo area, be careful not
to damage the rails.
For more information on this feature seeLuggage
Carrier on page 2-65.
2-66

Cargo Area Floor Drains
Your vehicle also has four cargo-area oor drains (A)
located under the cargo mat, if it has this feature,
near the sides of the cargo area. These drains should
be cleaned periodically to allow water to exit the
cargo area.The cargo mat has cutouts for the drains. You can ush
the drains through the cutouts, but if the cargo area
is extremely dirty you can lift up the edges of the cargo
oor mat or take the whole mat out and ush the
drains with water. The drain grates can be removed to
clear any debris that has accumulated in the drain.
Sunroof
The vehicle may have a
power sliding sunroof.
The ignition must be on or
in the accessory position,
or Retained Accessory
Power (RAP) must be
active.
SeeRetained Accessory Power (RAP) on page 2-29.
The switch used to operate the sunroof is located in the
overhead console.
2-67

Express-Open/Close Sunroof
The sunroof has a feature which allows the sunroof
panel to be opened or closed without continuously
pressing the switch. The express-open can be stopped
at any time by pushing the front of the switch a
second time.
The sunroof has four positions:
Comfort open stop:To open the sunroof and
sunshade, press the rear of the switch quickly and
release. The glass panel will open to an interim
position that reduces wind noise. For information on
using the sunshade, see “Sunshade Operation” later.
Full open stop:To open the sunroof further, press
the rear of the switch quickly once more.
Express close:To close the sunroof, press the front
of the switch quickly and release.
Vent:The vent position allows the rear of the sunroof
to be opened and tilted upward. With the sunroof in
the fully closed position, press and hold the front of
the switch until the sunroof reaches the desired vent
position or until it stops moving. To close the sunroof
from the vent position, press and hold the rear of the
switch until the sunroof is fully closed.
Do not leave the sunroof open for long periods of time
as debris may collect in the tracks.
Anti-Pinch Protection Feature
If something gets caught between the glass panel and
roof frame while the sunroof is closing, the glass
panel will stop and open half way, and the deector will
raise fully.
If something gets caught between the glass panel and
the roof frame during the tilt down operation, the
glass panel will stop and open fully.
If the sunroof panel receives a strong impact, the
anti-pinch protection feature may work even if nothing
gets caught between the glass panel and roof frame.
Sunshade Operation
The sunshade will open automatically when opening the
sunroof.
However, it can manually be pulled shut after the
sunroof is closed. To adjust the sunshade, push it
backward or pull it forward to the desired position.
The sunshade cannot be adjusted further than
the current closed position of the sunroof.
Notice:If you force the sunshade forward of the
sliding glass panel, damage will occur and the
sunroof may not open or close properly. Always
close the glass panel before closing the sunshade.
2-68

Automatic Headlamp System
When it is dark enough outside and the headlamp
switch is in AUTO, the automatic headlamp system will
turn on the headlamps at the normal brightness along
with other lamps such as the taillamps, sidemarker,
parking lamps, roof marker lamps, and the instrument
panel lights. The radio lights will also be dim.
To turn off the automatic headlamp system, turn the
exterior lamps switch to the off position and then
release. For vehicles rst sold in Canada, the
transmission must be in the PARK (P) position, before
the automatic headlamp system can be turned off.
The 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
systems 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 sees a change in lighting
lasting longer than the delay.
If the vehicle is started in a dark garage, the automatic
headlamp system will come on immediately. Once
the vehicle leaves the garage, it takes approximately
one minute for the automatic headlamp system to
change to DRL if it is light outside. During that delay,
the instrument panel cluster may not be as bright
as usual. Make sure the instrument panel brightness
control is in the full bright position. SeeInstrument
Panel Brightness on page 3-18.
Instrument Panel Brightness
D(Instrument Panel Brightness):This feature
controls the brightness of the instrument panel lights
and is located next to the exterior lamp control.
Push the knob to extend out and then it can be turned.
Turn the knob clockwise or counterclockwise to
brighten or dim the instrument panel lights. Turning
the knob to the farthest clockwise position turns
on the dome lamps.
3-18

XM™ Satellite Radio Service
XM™ Satellite Radio Service gives digital radio
reception from coast-to-coast in the 48 contiguous
United States, and in Canada. Just as with FM, tall
buildings or hills can interfere with satellite radio signals,
causing the sound to fade in and out. In addition,
traveling or standing under heavy foliage, bridges,
garages, or through tunnels could cause loss of the XM
signal for a period of time. The radio may display NO XM
SIGNAL to indicate interference.
Fixed Mast Antenna
The xed mast antenna can withstand most car washes
without being damaged. If the mast should ever become
slightly bent, straighten it out by hand. If the mast is badly
bent, replace it.
Check occasionally to make sure the mast is still
tightened.
XM™ Satellite Radio Antenna
System
The XM™ Satellite Radio antenna is located on the roof
of your vehicle. Keep this antenna clear of snow and
ice build up for clear radio reception.
If your vehicle has a sunroof, the performance of the
XM™ system may be affected if the sunroof is open.
Loading items onto the roof of your vehicle can interfere
with the performance of the XM™ system. Make sure
the XM™ Satellite Radio antenna is not obstructed.
3-118

Loading Your Vehicle for Off-Road
Driving
{CAUTION:
Cargo on the load oor piled higher than
the seatbacks can be thrown forward
during a sudden stop. You or your
passengers could be injured. Keep cargo
below the top of the seatbacks.
Unsecured cargo on the load oor can be
tossed about when driving over rough
terrain. You or your passengers can be
struck by ying objects. Secure the cargo
properly.
Heavy loads on the roof raise the vehicle’s
center of gravity, making it more likely to
roll over. You can be seriously or fatally
injured if the vehicle rolls over. Put heavy
loads inside the cargo area, not on the
roof. Keep cargo in the cargo area as far
forward and low as possible.There are some important things to remember about
how to load your vehicle.
The heaviest things should be on the load oor and
forward of your rear axle. Put heavier items in the
rear area, as far forward as you can.
Be sure the load is secured properly, so driving on
the off-road terrain does not toss things around.
You will nd other important information in this manual.
SeeLoading Your Vehicle on page 4-44andTires
on page 5-55.
Environmental Concerns
Off-road driving can provide wholesome and satisfying
recreation. However, it also raises environmental
concerns. We recognize these concerns and urge every
off-roader to follow these basic rules for protecting
the environment:
Always use established trails, roads, and areas that
have been specially set aside for public off-road
recreational driving; obey all posted regulations.
Avoid any driving practice that could damage
the environment — shrubs, owers, trees,
grasses — or disturb wildlife. This includes
wheel-spinning, breaking down trees, or
unnecessary driving through streams or over
soft ground.
4-14

Service............................................................5-3
Accessories and Modications..........................5-3
California Proposition 65 Warning.....................5-3
California Perchlorate Materials Requirements.....5-4
Doing Your Own Service Work.........................5-4
Adding Equipment to the Outside of
Your Vehicle..............................................5-4
Fuel................................................................5-5
Gasoline Octane............................................5-5
Gasoline Specications....................................5-5
California Fuel...............................................5-5
Additives.......................................................5-6
Fuels in Foreign Countries...............................5-6
Filling the Tank..............................................5-7
Filling a Portable Fuel Container.......................5-9
Checking Things Under the Hood.....................5-9
Hood Release..............................................5-10
Engine Compartment Overview.......................5-12
Engine Oil...................................................5-13
Engine Oil Life System..................................5-16
Engine Air Cleaner/Filter................................5-18
Automatic Transmission Fluid.........................5-21
Engine Coolant.............................................5-24
Coolant Surge Tank Pressure Cap..................5-26
Engine Overheating.......................................5-27Overheated Engine Protection
Operating Mode.........................................5-28
Cooling System............................................5-29
Engine Fan Noise.........................................5-33
Power Steering Fluid.....................................5-34
Windshield Washer Fluid................................5-35
Brakes........................................................5-36
Battery........................................................5-39
Jump Starting...............................................5-40
Rear Axle.......................................................5-45
Four-Wheel Drive............................................5-46
Front Axle......................................................5-47
Bulb Replacement..........................................5-48
Halogen Bulbs..............................................5-48
Headlamps..................................................5-48
Front Turn Signal and Parking Lamps..............5-49
Daytime Running Lamps (DRL).......................5-50
Roof Marker Lamps......................................5-50
Taillamps, Turn Signal, Stoplamps and
Back-up Lamps.........................................5-51
Replacement Bulbs.......................................5-53
Windshield Wiper Blade Replacement..............5-54
Tires..............................................................5-55
Tire Sidewall Labeling...................................5-56
Tire Terminology and Denitions.....................5-58
Section 5 Service and Appearance Care
5-1

Daytime Running Lamps (DRL)
To replace a daytime running lamp bulb:
1. Locate the lamp
assembly behind the
front bumper through
the wheel opening.
2. Turn the bulb socket counterclockwise and remove
it from the lamp housing.
3. Remove the bulb from the bulb socket.
4. Install the new bulb into the bulb socket.
5. Reinstall the bulb socket into the lamp housing and
turn it clockwise until it locks.
Roof Marker Lamps
Corner Roof Marker Lamps
To replace one of these bulbs:
1. Remove the screw and lift off the lens.
2. Turn the bulb socket counterclockwise to remove it.
3. Remove the bulb.
4. Install a new bulb into the socket.
5. Reinstall the socket into the lens and turn it
clockwise to lock it into place.
6. Hook the side of the lens with the hook end into the
notch rst and then tighten the screw.
5-50

Center Roof Marker Lamps
To replace one of these bulbs:
1. Push in on the notch with a at tool and pull the
lamp out.
2. Turn the bulb socket counterclockwise and remove
it from the lamp housing.
3. Remove the bulb from the bulb socket.
4. Install a new bulb into the bulb socket.
5. Place the hook end of the lamp in place on one
side and push the other end of the lamp down
until it locks in place.
Taillamps, Turn Signal, Stoplamps
and Back-up Lamps
A. Stoplamp/Taillamp
B. Turn Signal Lamp
C. Back-Up Lamp
5-51