HUMMER H3 2006 Owners Manual

Rear Axle
When to Check and Change Lubricant
It is not necessary to regularly check rear axle uid
unless you suspect there is a leak or you hear an
unusual noise. A uid loss could indicate a problem.
Have it inspected and repaired.
How to Check Lubricant
To get an accurate reading, the vehicle should be on a
level surface.
If the level is below the bottom of the ller plug hole,
located on the rear axle, you will need to add some
lubricant. Add enough lubricant to raise the level to the
bottom of the ller plug hole.
What to Use
SeeRecommended Fluids and Lubricants on page 6-12
to determine which kind of lubricant to use.
Front Axle
It is recommended that the front axle uid be checked
and lled by your dealer.
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Headlamp Aiming
The vehicle has a visual optical headlamp aiming
system. The aim has been preset at the factory and
should need no further adjustment.
However, if the vehicle is damaged in an accident,
the headlamp aim may be affected and adjustment may
be necessary.
If oncoming vehicles ash their high beams at you, this
may also mean the vertical aim needs to be adjusted.
It is recommended that the vehicle is taken to your
dealer for service if the headlamps need to be re-aimed.
It is possible however, to re-aim the headlamps as
described in the following procedure.The vehicle should be properly prepared as follows:The vehicle should be placed so the headlamps
are 25 ft. (7.6 m) from a light colored wall or
other at surface.
The vehicle must have all four tires on a level
surface which is level all the way to the wall or
other at surface.
The vehicle should be placed so it is perpendicular
to the wall or other at surface.
The vehicle should not have any snow, ice,
or mud on it.
The vehicle should be fully assembled and all other
work stopped while headlamp aiming is being
performed.
The vehicle should be normally loaded with a
full tank of fuel and one person or 160 lbs (75 kg)
sitting on the driver’s seat.
Tires should be properly inated.
The spare tire is in its original location in the vehicle.
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To adjust the vertical aim, do the following:
1. Open the hood. SeeHood Release on page 5-11
for more information.
2. Find the aim dot on the lens of the headlamp.
3. Measure the distance from the ground to the aim
dot on the headlamp. Record the distance.4. At the wall or other at surface, measure from the
ground upward the recorded distance from Step 2
and mark it.
5. Draw or tape a horizontal line the width of the
vehicle at the wall or other at surface 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.
6. 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 at surface.
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7. 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.8. Turn the vertical aiming screw until the headlamp
beam is aimed to the horizontal tape line. If you turn
it clockwise, it will raise the beam and if you turn it
counterclockwise, it will lower the beam.
The top edge of the cut-off should be positioned at
the bottom edge of the horizontal tape line.
9. Repeat Steps 7 and 8 for the opposite headlamp. Passenger’s Side Shown
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Bulb Replacement
For the proper type of replacement bulbs, see
Replacement Bulbs on page 5-51.
For any bulb changing procedure not listed in this
section, contact your dealer.
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, do the following:
1. Open the hood. SeeHood Release on page 5-11
for more information.
2. Reach in and access the headlamp bulb.
3. Turn the bulb socket counterclockwise to remove it
from the headlamp assembly.
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4. Unplug the electrical connector by pushing the
release tab and pulling the bulb socket out.
5. Replace with a new bulb socket.
6. Reinstall the electrical connector.
7. Reinstall the bulb socket into the headlamp
assembly making sure to align the tabs on the bulb
socket with the tabs in the headlamp housing.
8. Turn the bulb socket clockwise to secure it.Taillamps, Turn Signal, Stoplamps
and Back-up Lamps
A. Stoplamp, Taillamp and
Turn Signal Lamp
B. Back-up Lamp
To replace one of these bulbs in the taillamp assembly,
do the following:
1. Open the swing-gate. SeeSwing-gate on page 2-9
for more information.
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2. Remove the two screws
from the taillamp
assembly.
3. Remove the taillamp assembly by pulling it gently to
release the two locator tabs. The locator tabs
connect the taillamp assembly to the vehicle’s frame.
4. Turn the bulb socket counterclockwise to remove it
from the taillamp housing.5. Replace with a new bulb.
6. Insert the bulb into the taillamp housing and turn it
counterclockwise until it is locked into place.
7. Reinstall the rear lamp assembly by lining up the
locator tabs with the holes in the vehicle’s frame.
8. Reinstall the two screws.
Replacement Bulbs
Exterior Lamp Bulb Number
Back-up Lamp, Stoplamp,
Taillamp and Turn Signal Lamp3157K
Low-Beam and High-Beam
HeadlampH13
For replacement bulbs not listed here, contact your
dealer. Passenger’s Side
Shown
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Windshield Wiper Blade
Replacement
Windshield wiper blades should be inspected for wear
and cracking. SeeScheduled Maintenance on page 6-4
for more information.
Replacement blades come in different types and are
removed in different ways. For proper type and length, see
Normal Maintenance Replacement Parts on page 6-13.
To replace the windshield wiper blade assembly do the
following:
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, follow the steps listed
above.
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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 GM Warranty booklet for details. For additional
information refer to the tire manufacturer’s booklet
included with your vehicle’s Owner Manual.
{CAUTION:
Poorly maintained and improperly used tires
are dangerous.
Overloading your tires can cause
overheating as a result of too much
friction. You could have an air-out and a
serious accident. SeeLoading Your
Vehicle on page 4-52.
CAUTION: (Continued)
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 tires are cold. SeeInflation - Tire
Pressure on page 5-60.
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 your
tread is badly worn, or if your tires have
been damaged, replace them.
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Tire Sidewall Labelling
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.
(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 5-68.
(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 seeInation - Tire Pressure
on page 5-60andLoading Your Vehicle on page 4-52. Passenger (P-Metric) Tire
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