service HUMMER H3 2009 Owners Manual

To adjust the vertical aim:
1. Open the hood. SeeHood
Release on page 5-9.
2. Record the distance from the
ground to the aim dot on the
headlamp.3. At a wall, measure from the
ground upward the recorded
distance from Step 2 and mark it.
4. Draw or tape a horizontal line the
width of the vehicle at the wall
where it was marked it Step 4.
Notice:Do not cover a headlamp
to improve beam cut-off when
aiming. Covering a headlamp may
cause excessive heat build-up
which may cause damage to the
headlamp.
5. Turn on the headlamps and
place a piece of cardboard
or equivalent in front of the
headlamp not being aimed.This should allow only the beam
of light from the headlamp being
aimed to be seen on the wall.
6. Locate the vertical headlamp
aiming screws, which are
under the hood near each
headlamp assembly.
The adjustment screw can be
turned with an E8 Torx
®socket
or T15 Torx®screwdriver.
Passenger Side Shown
5-40 Service and Appearance Care

7. Turn the vertical aiming screw
until the headlamp beam is
aimed to the horizontal tape
line. Turn it clockwise or
counterclockwise to raise or
lower the beam.
The top edge of the cut-off
should be positioned at the
bottom edge of the horizontal
tape line.
8. Repeat Steps 7 and 8 for the
opposite headlamp.
Bulb Replacement
For the proper type of replacement
bulbs, seeReplacement Bulbs
on page 5-43.
For any bulb changing procedure
not listed in this section, contact
your dealer/retailer.
Halogen Bulbs
{CAUTION
Halogen bulbs have pressurized
gas inside and can burst if you
drop or scratch the bulb. You or
others could be injured. Be sure
to read and follow the instructions
on the bulb package.
Headlamps
To replace a headlamp bulb:
1. Open the hood. SeeHood
Release on page 5-9for
more information.
2. Turn the bulb socket
counterclockwise to remove it
from the headlamp assembly
and pull it straight out.
3. Unplug the electrical connector
by pushing the release tab and
pulling the bulb socket out.
4. Replace with a new bulb socket.
5. Reverse Steps 1 through 3 to
reinstall.
Service and Appearance Care 5-41

Taillamps, Turn Signal,
Stoplamps and Back-up
Lamps (H3)
A. Stoplamp, Taillamp and Turn
Signal Lamp
B. Back-up LampTo replace one of these bulbs in the
taillamp assembly:
1. Open the swing-gate.
SeeSwing-gate on page 2-9.
2. Remove the two screws from the
taillamp assembly.
3. Pull the taillamp assembly away
from the vehicle.
4. Turn the bulb socket
counterclockwise to remove it
from the taillamp assembly.5. Pull the old bulb to release it
from the socket.
6. Reverse Steps 1 through 4 to
reinstall.
Taillamps, Turn Signal,
Stoplamps and Back-up
Lamps (H3T)
A. Stoplamp and Taillamp
B. Turn Signal Lamp
C. Back-up Lamp
Passenger Side Shown
5-42 Service and Appearance Care

To replace one of these bulbs in the
taillamp assembly:
1. Open the tailgate. SeeTailgate
on page 2-7.
2. Remove the two screws from the
taillamp assembly.
3. Pull the taillamp assembly away
from the vehicle.
4. Turn the bulb socket
counterclockwise to remove it
from the taillamp assembly.
5. Pull the old bulb to release it
from the socket.6. Turn the bulb socket clockwise to
reinstall in the taillamp assembly.
7. Reinstall the taillamp assembly
making sure to line up the pins
with the vehicle.
8. Reinstall the two screws.
License Plate Lamp
To replace one of these bulbs:
1. Remove the two screws holding
the license plate lamp.
2. Pull the license plate lamp away
from the fascia.
3. Turn the bulb socket
counterclockwise and pull the
bulb straight out of the license
plate lamp assembly.4. Install the new bulb into the
socket.
5. Reverse Steps 1 through 4 to
reinstall.
Replacement Bulbs
Exterior LampBulb
Number
Back-up Lamp (H3T) W16W
Back-up (H3),
Stoplamp,
Taillamp and Turn
Signal Lamp3157K
License Plate Lamp 194
Low-Beam and
High-Beam
HeadlampH13
For replacement bulbs not listed
here, contact your dealer/retailer.
Service and Appearance Care 5-43

Windshield Wiper
Blade Replacement
Windshield wiper blades should be
inspected for wear and cracking.
SeeScheduled Maintenance
on page 6-4for more information.
Replacement blades come in
different types and are removed in
different ways. For proper type
and length, seeMaintenance
Replacement Parts on page 6-14.
To replace the windshield wiper
blade:
1. Lift the wiper arm away from the
windshield.2. Push the release lever (B) to
disengage the hook and push
the wiper arm (A) out of the
blade (C).
3. Push the new wiper blade
securely on the wiper arm
until you hear the release lever
click into place.
To replace the rear wiper blade,
lift the rear wiper arm from the
window and pull the blade.
Tires
Your new vehicle comes with
high-quality tires made by
a leading tire manufacturer.
If you ever have questions about
your tire warranty and where
to obtain service, see your
vehicle Warranty booklet
for details. For additional
information refer to the tire
manufacturer.
{CAUTION
Poorly maintained and
improperly used tires are
dangerous.
Overloading your
vehicle’s tires can
cause overheating as a
result of too much exing.
You could have an air-out
and a serious accident.
SeeLoading the Vehicle
on page 4-35.
(Continued)
5-44 Service and Appearance Care

CAUTION (Continued)
Underinated tires pose
the same danger as
overloaded tires. The
resulting accident could
cause serious injury.
Check all tires frequently to
maintain the recommended
pressure. Tire pressure
should be checked when
your vehicle’s tires are
cold. SeeInflation - Tire
Pressure on page 5-51.
Overinated tires are more
likely to be cut, punctured,
or broken by a sudden
impact — such as when
you hit a pothole. Keep
tires at the recommended
pressure.
Worn, old tires can cause
accidents. If the tire’s tread
is badly worn, or if your
vehicle’s tires have been
damaged, replace them.
Tire Sidewall Labeling
Useful information about a tire
is molded into the sidewall.
The following illustrations are
examples of a typical P-Metric
and a LT-Metric tire sidewall.
(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) TPC Spec (Tire
Performance Criteria
Specication)
: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) DOT (Department of
Transportation)
:The
Department of Transportation
(DOT) code indicates that
the tire is in compliance
with the U.S. Department of
Transportation Motor Vehicle
Safety Standards.
Passenger (P-Metric) Tire
Service and Appearance Care 5-45

(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.
(F) Uniform Tire Quality
Grading (UTQG)
:Tire
manufacturers are required to
grade tires based on three
performance factors: treadwear,
traction, and temperature
resistance. For more information,
seeUniform Tire Quality
Grading on page 5-62.(G) Maximum Cold Ination
Load Limit
:Maximum load that
can be carried and the maximum
pressure needed to support that
load. For information on
recommended tire pressure see
Inflation - Tire Pressure on
page 5-51andLoading the
Vehicle on page 4-35.
(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) TPC Spec (Tire
Performance Criteria
Specication)
: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
Inflation - Tire Pressure on
page 5-51andLoading the
Vehicle on page 4-35.
Light Truck (LT-Metric) Tire
5-46 Service and Appearance Care

(D) DOT (Department of
Transportation):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 seeInflation - Tire
Pressure on page 5-51and
Loading the Vehicle on
page 4-35.
Tire Size
The following examples show
the different parts of a tire size.(A) Passenger (P-Metric) Tire
:The United States version of
a metric tire sizing system.
The letter P as the rst
character in the tire size
means a passenger vehicle
tire engineered to standards
set by the U.S. Tire and
Rim Association.
(A) Light Truck (LT-Metric)
Tire
:The United States version
of a metric tire sizing system.
The letters LT as the rst
two characters in the tire
size means a light truck tire
engineered to standards set
by the U.S. Tire and Rim
Association.
(B) Tire Width
:The three-digit
number indicates the tire section
width in millimeters from sidewall
to sidewall.
Passenger (P-Metric) Tire
Light Truck (LT-Metric) Tire
Service and Appearance Care 5-47

(C) Aspect Ratio:A two-digit
number that indicates the tire
height-to-width measurements.
For example, if the tire size
aspect ratio is 75, as shown
in item C of the light truck
(LT-Metric) tire illustration,
it would mean that the tire’s
sidewall is 75 percent as high
as it is wide.
(D) Construction Code
:A letter code is used to indicate
the type of ply construction in
the tire. The letter R means
radial ply construction; the
letter D means diagonal or
bias ply construction; and the
letter B means belted-bias
ply construction.
(E) Rim Diameter
:Diameter of
the wheel in inches.
(F) Service Description
:The service description indicates
the load range and speed
rating of a tire. The load index
can range from 1 to 279. Speed
ratings range from A to Z.
Tire Terminology and
Denitions
Air Pressure:The amount of
air inside the tire pressing
outward on each square inch
of the tire. Air pressure is
expressed in pounds per square
inch (psi) or kilopascal (kPa).
Accessory Weight
:This means
the combined weight of optional
accessories. Some examples
of optional accessories are,
automatic transmission, power
steering, power brakes, power
windows, power seats, and air
conditioning.
Aspect Ratio
:The relationship
of a tire’s height to its width.
Belt
:A rubber coated layer of
cords that is located between the
plies and the tread. Cords may
be made from steel or other
reinforcing materials.Bead
:The tire bead contains
steel wires wrapped by steel
cords that hold the tire onto
the rim.
Bias Ply Tire
:A pneumatic tire
in which the plies are laid at
alternate angles less than
90 degrees to the centerline
of the tread.
Cold Tire Pressure
:The
amount of air pressure in a tire,
measured in pounds per
square inch (psi) or kilopascals
(kPa) before a tire has built
up heat from driving. See
Inflation - Tire Pressure on
page 5-51.
Curb Weight
:The weight of a
motor vehicle with standard
and optional equipment including
the maximum capacity of fuel,
oil, and coolant, but without
passengers and cargo.
5-48 Service and Appearance Care

DOT Markings:A code molded
into the sidewall of a tire
signifying that the tire is in
compliance with the U.S.
Department of Transportation
(DOT) motor vehicle safety
standards. The DOT code
includes the Tire Identication
Number (TIN), an alphanumeric
designator which can also
identify the tire manufacturer,
production plant, brand, and date
of production.
GVWR
:Gross Vehicle Weight
Rating. SeeLoading the Vehicle
on page 4-35.
GAWR FRT
:Gross Axle
Weight Rating for the front axle.
SeeLoading the Vehicle on
page 4-35.
GAWR RR
:Gross Axle
Weight Rating for the rear axle.
SeeLoading the Vehicle on
page 4-35.Intended Outboard Sidewall
:The side of an asymmetrical tire,
that must always face outward
when mounted on a vehicle.
Kilopascal (kPa)
:The metric
unit for air pressure.
Light Truck (LT-Metric) Tire
:A tire used on light duty trucks
and some multipurpose
passenger vehicles.
Load Index
:An assigned
number ranging from 1 to 279
that corresponds to the load
carrying capacity of a tire.
Maximum Ination Pressure
:The maximum air pressure
to which a cold tire can be
inated. The maximum air
pressure is molded onto the
sidewall.
Maximum Load Rating
:The load rating for a tire at the
maximum permissible ination
pressure for that tire.Maximum Loaded Vehicle
Weight
:The sum of curb
weight, accessory weight,
vehicle capacity weight, and
production options weight.
Normal Occupant Weight
:The number of occupants
a vehicle is designed to seat
multiplied by 150 lbs (68 kg).
SeeLoading the Vehicle
on page 4-35.
Occupant Distribution
:Designated seating positions.
Outward Facing Sidewall
:The side of an asymmetrical tire
that has a particular side that
faces outward when mounted on
a vehicle. The side of the tire
that contains a whitewall,
bears white lettering, or bears
manufacturer, brand, and/or
model name molding that
is higher or deeper than the
same moldings on the
other sidewall of the tire.
Service and Appearance Care 5-49