torque HUMMER H3 2009 Owners Manual

Full-Time Four-Wheel
Drive
Full-Time Four-Wheel Drive sends
engine power to all four wheels
for extra traction. To get the most
out of Full-Time Four-Wheel Drive,
you must be familiar with its
operation.
Transfer Case Buttons
The transfer case buttons are
located to the right of the instrument
panel cluster. Use these switches to
shift into and out of the different
Full-Time Four-Wheel Drive modes.4
m(Four-Wheel High):This
setting is used for driving in most
street and highway situations.
You can also use this setting for
light or variable off-road conditions.
N (Neutral):Shift the transfer
case to Neutral only when towing
the vehicle. SeeRecreational
Vehicle Towing on page 4-40or
Towing Your Vehicle on page 4-40
for more information.
Notice:Driving on pavement in
Four-Wheel High Lock or Four
Wheel Low Lock for extended
periods may cause premature
wear on the vehicle powertrain
and tires. Do not drive in
Four-Wheel High Lock or
Four-Wheel Low Lock on
pavement for extended periods.
4
mQ(Four-Wheel-High Lock):
Use this setting when you need
extra traction in most off-road
situations such as sand, mud, snow
or level, rocky trails.Notice:Operating the vehicle in
Four-Wheel-Low Lock above
30 mph (48 km/h) for any
extended period of time could
cause damage to the transfer
case. Do not operate the vehicle
in Four-Wheel-Low Lock above
30 mph (48 km/h) for extended
periods.
4
nQ(Four-Wheel-Low Lock):
This setting delivers extra torque to
all four wheels and is used for
extreme off-road conditions.
If the vehicle has locking axles,
they can be locked for additional
traction in extreme off-road
situations. SeeLocking Rear Axle
on page 4-8andLocking Front Axle
on page 4-9.
Indicator lights in the buttons show
which setting the transfer case
is in. The indicator lights will come
on briey when the ignition is in
ON/RUN. The If the lights do
not come on, take the vehicle to
your dealer/retailer for service.
2-24 Features and Controls

Then, see if you can move the shift
lever away from P (Park) without
rst pressing the shift lever button.
If you can, it means that the
shift lever was not fully locked into
P (Park).
Torque lock is when the weight of
the vehicle puts too much force
on the parking pawl in the
transmission. This happens when
parking on a hill and shifting
the transmission into P (Park) is
not done properly and then it
is difficult to shift out of P (Park).
To prevent torque lock, set the
parking brake and then shift into
P (Park). To nd out how, see
“Shifting Into P (Park)” listed
previously.
If torque lock does occur, your
vehicle may need to be pushed
uphill by another vehicle to relieve
the parking pawl pressure, so
you can shift out of P (Park).Shifting Out of Park
(Automatic
Transmission)
This vehicle is equipped with an
electronic shift lock release system.
The shift lock release is designed to:
Prevent ignition key removal
unless the shift lever is in P (Park)
with the shift lever button fully
released, and
Prevent movement of the shift
lever out of P (Park) unless
the ignition is in ON/RUN or
ACC/ACCESSORY and the
regular brake pedal is applied.
The shift lock release is always
functional except in the case of
a an uncharged or low voltage
(less than 9 volt) battery.
If the vehicle has an uncharged
battery or a battery with low voltage,
try charging or jump starting the
battery. SeeJump Starting on
page 5-34for more information.To shift out of P (Park):
1. Apply the brake pedal.
2. Then press the shift lever button.
3. Move the shift lever to the
desired position.
If you still are unable to shift out
of P (Park):
1. Fully release the shift lever
button.
2. While holding down the brake
pedal, press the shift lever
button again.
3. Move the shift lever to the
desired position.
If you still cannot move the shift
lever from P (Park), consult your
dealer/retailer or a professional
towing service.
2-30 Features and Controls

To remove or install cargo tie-downs
at the front of the bed, slide the
corner cap towards the center of the
bed to expose the rail notches.
To remove the corner cap,
pull either edge away from the rail.
To remove the system, loosen
the toggle bolts on each rail until
they can be removed from the bed
of the truck. To replace the system,
place the toggle bolts and rails
into their original locations and
tighten them to a torque setting of
12.5 ft-lbs (17Y).
Notice:If cargo is tied down
using the horizontal slots on the
top of the pickup box, the box
could be damaged. Using the
horizontal slots on the top of
the pickup box for tie-down
locations may cause damage to
the pickup box and would not
be covered by the vehicle
warranty. Only use the tie-down
loops if the vehicle does not have
the cargo management system.Sunroof
To operate a power sliding sunroof,
the ignition must be on, or Retained
Accessory Power (RAP) must be
active. SeeRetained Accessory
Power (RAP) on page 2-17.
The switch used to operate the
sunroof is located in the headliner.
Express Open/Express Close:
To express-open the sunroof, fully
press and release the rear of
the switch. The sunroof will open
automatically. To stop the sunroof
partway, press the switch asecond time. To express-close the
sunroof, fully press and release
the front of the switch. The sunroof
will close automatically. To stop
the sunroof partway, press the
switch a second time. The sunshade
will open automatically with the
sunroof, but can also be opened
manually. The sunroof has a comfort
stop feature which stops the
sunroof from opening to the
full-open position. From the comfort
stop position, press the rear of
the switch a second time to open
the sunroof to the full-open position.
When the sunroof is opened, an
air deector will automatically raise.
The air deector will retract when
the sunroof is closed.
Vent:The sunroof has an
express-vent open feature. From the
closed position, press the rear of
the switch to vent the sunroof.
To stop the sunroof partway, press
the switch a second time. To close
the sunroof, press and hold the front
of the switch. To stop the sunroof
partway, release the switch.
2-50 Features and Controls

For mounds, washouts, loose
up-hill slopes, ditches, etc.
When wheel spin occurs as the
vehicle is moving, the driver may
notice a slight shaking or shuddering
of the vehicle. This should be
stopped as soon as possible to
prevent damage to vehicle
components. This is the indication
that a loss of traction is occurring on
this terrain. The operator should:
1. Reduce speed and apply
the brakes.
2. Assess the terrain properly and
adjust vehicle speed and gear
ranges accordingly: Four-Wheel
High position for higher speeds
and Four-Wheel-Low Lock
for more torque and lower
speeds. Transmission 1 (First)
gear is generally recommended.3. Apply slight pressure to the
brake when the shaking or
shuddering sensation is felt,
keeping the vehicle moving in a
controlled manner.
4. Be prepared to alternate between
braking and accelerating through
the adverse terrain.
Getting Familiar with Off-Road
Driving
It is a good idea to practice in an
area that is safe and close to home
before you go into the wilderness.
Off-roading requires some new
and different skills.
Tune your senses to different
kinds of signals. Your eyes need
to constantly sweep the terrain
for unexpected obstacles. Your ears
need to listen for unusual tire or
engine sounds. Use your arms,
hands, feet, and body to respond to
vibrations and vehicle bounce.Controlling the vehicle is the key to
successful off-road driving. One of
the best ways to control the
vehicle is to control the speed.
At higher speeds:
You approach things faster and
have less time to react.
There is less time to scan the
terrain for obstacles.
The vehicle has more bounce
when driving over obstacles.
More braking distance is needed,
especially on an unpaved surface.
{CAUTION
When you are driving off-road,
bouncing and quick changes in
direction can easily throw you
out of position. This could cause
you to lose control and crash.
So, whether you are driving
on or off the road, you and
your passengers should wear
safety belts.
4-18 Driving Your Vehicle

Brake Wear
This vehicle has disc brakes. Disc
brake pads have built-in wear
indicators that make a high-pitched
warning sound when the brake
pads are worn and new pads are
needed. The sound can come
and go or be heard all the time the
vehicle is moving, except when
applying the brake pedal rmly.
{CAUTION
The brake wear warning sound
means that soon the brakes will
not work well. That could lead to
an accident. When the brake wear
warning sound is heard, have the
vehicle serviced.Notice:Continuing to drive with
worn-out brake pads could
result in costly brake repair.
Some driving conditions or climates
can cause a brake squeal when
the brakes are rst applied or lightly
applied. This does not mean
something is wrong with the brakes.
Properly torqued wheel nuts are
necessary to help prevent
brake pulsation. When tires are
rotated, inspect brake pads for wear
and evenly tighten wheel nuts in
the proper sequence to torque
specications inCapacities and
Specifications on page 5-96.
Brake linings should always be
replaced as complete axle sets.
Brake Pedal Travel
See your dealer/retailer 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 that brake service might
be required.
Brake Adjustment
Every brake stop, the 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.
The vehicle was designed and
tested with top-quality brake parts.
5-32 Service and Appearance Care

When rotating the vehicle’s tires,
always use the correct rotation
pattern shown here. Do not
include the spare tire in the tire
rotation.
After the tires have been rotated,
adjust the front and rear ination
pressures as shown on the Tire
and Loading Information label.
SeeInflation - Tire Pressure on
page 5-51andLoading the
Vehicle on page 4-35.Reset the Tire Pressure Monitor
System. SeeTire Pressure
Monitor Operation on page 5-54.
Make certain that all wheel
nuts are properly tightened.
See “Wheel Nut Torque” under
Capacities and Specifications
on page 5-96.
{CAUTION
Rust or dirt on a wheel, or
on the parts to which it is
fastened, can make wheel
nuts become loose after time.
The wheel could come off and
cause an accident. When you
change a wheel, remove any
rust or dirt from places where
the wheel attaches to the
vehicle. In an emergency, you
can use a cloth or a paper
towel to do this; but be sure to
use a scraper or wire brush
later, if needed, to get all the
rust or dirt off. SeeChanging
a Flat Tire on page 5-66.
When It Is Time for
New Tires
Various factors, such as
maintenance, temperatures,
driving speeds, vehicle loading,
and road conditions inuence
when you need new tires.
One way to tell when it is time for
new tires is to check the treadwear
indicators, which will appear when
the tires have only 1/16 inch
(1.6 mm) or less of tread remaining.
5-58 Service and Appearance Care

11. Tighten each wheel nut by
hand. Then use the wheel
wrench to tighten the nuts
until the wheel is held
against the hub.
12. Turn the wheel wrench
counterclockwise to lower
the vehicle. Lower the jack
completely.
{CAUTION
Incorrect or improperly tightened
wheel nuts can cause the wheel
to come loose and even come off.
This could lead to a crash. If you
have to replace them, be sure to
get new original equipment wheel
nuts. Stop somewhere as soon
as you can and have the nuts
(Continued)
CAUTION (Continued)
tightened with a torque wrench to
the proper torque specication.
SeeCapacities and Specifications
on page 5-96for wheel nut torque
specication.
Notice:Improperly tightened
wheel nuts can lead to brake
pulsation and rotor damage.
To avoid expensive brake repairs,
evenly tighten the wheel nuts
in the proper sequence and to
the proper torque specication.
SeeCapacities and Specifications
on page 5-96for the wheel nut
torque specication.13. Tighten the nuts rmly in a
crisscross sequence as
shown by turning the wheel
wrench clockwise.
14. After installing the wheel and
tire, reinstall the center cap.
Place the cap on the wheel and
tap it into place until it sits
ush with the wheel.
Service and Appearance Care 5-75

Storing a Flat or Spare
Tire and Tools (H3)
{CAUTION
Storing a jack, a tire, or other
equipment in the passenger
compartment of the vehicle could
cause injury. In a sudden stop or
collision, loose equipment could
strike someone. Store all these in
the proper place.To store the at or spare tire on the
spare tire mount:
1. Slide the at or spare tire onto
the swing-gate.
You may need assistance
to do this.
2. Reinstall the nuts to retain the
at or spare tire.
3. Tighten the nuts by hand.
{CAUTION
Incorrect or improperly tightened
wheel nuts can cause the wheel
to come loose and even come off.
This could lead to a crash. If you
have to replace them, be sure to
get new original equipment wheel
nuts. Stop somewhere as soon as
you can and have the nuts
tightened with a torque wrench to
the proper torque specication.
SeeCapacities and Specifications
on page 5-96for wheel nut torque
specication.
5-78 Service and Appearance Care

Capacities and Specications (cont’d)
ApplicationCapacities
English Metric
Transfer Case 1.6 qt1.5 L
Transmission (Drain and Rell) 3.7L L5 and 5.3L V8, Automatic Transmission 5.0 qt4.7 L
3.7L L5, Manual Transmission 2.5 qt2.4 L
Wheel Nut Torque 100 lb ft140Y
All capacities are approximate. When adding, be sure to ll to the approximate level, as recommended in this
manual.
Engine Specications
Engine VIN CodeTransmission Spark Plug Gap
3.7L L5 EAutomatic
Manual .040 in (1.01 mm)
5.3L V8 LAutomatic .040 in (1.01 mm)
Service and Appearance Care 5-97