maintenance schedule HUMMER H2 2007 User Guide

Brakes
Brake Fluid
Your brake master
cylinder reservoir is
lled with DOT-3 brake
uid. SeeEngine
Compartment Overview
on page 402for the
location of the reservoir.
There are only two reasons why the brake uid
level in the reservoir might go down. The rst
is that the brake uid goes down to an acceptable
level during normal brake lining wear. When new
linings are put in, the uid level goes back up.
The other reason is that uid is leaking out of the
brake system. If it is, you should have your
brake system xed, since a leak means that
sooner or later your brakes will not work well, or
will not work at all.So, it is not a good idea to top off your brake uid.
Adding brake uid will not correct a leak. If you
add uid when your linings are worn, then you will
have too much uid when you get new brake
linings. You should add or remove brake uid,
as necessary, only when work is done on
the brake hydraulic system.
{CAUTION:
If you have too much brake uid, it can
spill on the engine. The uid will burn if
the engine is hot enough. You or others
could be burned, and your vehicle could
be damaged. Add brake uid only when
work is done on the brake hydraulic
system. See “Checking Brake Fluid” in
this section.
Refer to the Maintenance Schedule to determine
when to check your brake uid. SeeScheduled
Maintenance on page 517.
427

How to Check Lubricant
To get an accurate reading, the vehicle should be
on a level surface.
When the differential is cold, the proper level is
from 5/8 inch to 1-5/8 inch (15 mm to 40 mm)
below the bottom of the ller plug hole, located on
the rear axle. Add only enough uid to reach
the proper level.
What to Use
Refer to the Maintenance Schedule to determine
what kind of lubricant to use. SeeRecommended
Fluids and Lubricants on page 528.
Four-Wheel Drive
Transfer Case
It is not necessary to regularly check transfer case
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.
Refer to the Maintenance Schedule to determine
how often to change the lubricant. See
Scheduled Maintenance on page 517.
438

How to Check Lubricant
A. Filler Plug B. Drain Plug
1. Remove the ller plug (A). The uid level
should be just below the bottom of the
ller plug hole located on the transfer case.
To get an accurate reading, the vehicle should
be on a level surface.2. Add uid if necessary.
Refer to the Maintenance Schedule to
determine what kind of lubricant to use.
SeeRecommended Fluids and Lubricants
on page 528.
3. Reinstall the ller plug. Use care not to
overtighten the ller plug.
439

Front Axle
When to Check and Change Lubricant
It is not necessary to regularly check front 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.
When the differential is cold, the proper level is
from about 1/4 inch (6 mm) to about 3/8 inch
(10 mm) below the ller plug hole.
What to Use
Refer to the Maintenance Schedule to determine
what kind of lubricant to use. SeeRecommended
Fluids and Lubricants on page 528.
440

Windshield Wiper Blade
Replacement
Windshield wiper blades should be inspected for
wear and cracking. SeeScheduled Maintenance
on page 517for more information.
Replacement blades come in different types and
are removed in different ways. For proper type and
length, seeNormal Maintenance Replacement
Parts on page 530.
To replace the windshield wiper blade assembly
do the following:
1. Lift the wiper arm and turn the blade until it is
facing away from the windshield.2. Push the release lever and slide the wiper
assembly toward the driver’s side of the
vehicle.
3. Install a new blade by reversing Steps 1 and 2.
447

How to Check
Use a good quality pocket-type gage to check
tire pressure. You cannot tell if your tires are
properly inated simply by looking at them.
Radial tires may look properly inated even when
they’re underinated. Check the tire’s ination
pressure when the tires are cold. Cold means your
vehicle has been sitting for at least three hours
or driven no more than 1 mile (1.6 km).
Remove the valve cap from the tire valve stem.
Press the tire gage rmly onto the valve to
get a pressure measurement. If the cold tire
ination pressure matches the recommended
pressure on the tire and loading information label,
no further adjustment is necessary. If the
pressure is low, add air until you reach the
recommended amount.
If you overll the tire, release air by pushing on
the metal stem in the center of the tire valve.
Recheck the tire pressure with the tire gage.
Be sure to put the valve caps back on the valve
stems. They help prevent leaks by keeping out dirt
and moisture.
Tire Inspection and Rotation
Tires should be rotated every 5,000 to 8,000 miles
(8 000 to 13 000 km).
Any time you notice unusual wear, rotate your
tires as soon as possible and check wheel
alignment. Also check for damaged tires or wheels.
SeeWhen It Is Time for New Tires on page 459
andWheel Replacement on page 464for
more information.
Make sure the spare tire is stored securely. Push,
pull, and then try to rotate or turn the tire. If it
moves, use the wheel wrench to tighten the wheel
nuts. SeeChanging a Flat Tire on page 468.
The purpose of regular rotation is to achieve
more uniform wear for all tires on the vehicle.
The rst rotation is the most important.
SeeScheduled Maintenance on page 517.
457

Maintenance Schedule................................ 514
Introduction............................................... 514
Maintenance Requirements........................ 514
Your Vehicle and the Environment............ 515
Using the Maintenance Schedule............... 515
Scheduled Maintenance............................. 517
Additional Required Services..................... 520
Maintenance Footnotes.............................. 521
Owner Checks and Services..................... 523At Each Fuel Fill....................................... 524
At Least Once a Month............................. 524
At Least Once a Year............................... 525
Recommended Fluids and Lubricants........ 528
Normal Maintenance
Replacement Parts ................................. 530
Engine Drive Belt Routing......................... 531
Maintenance Record.................................. 532
Section 6 Maintenance Schedule
513

Maintenance Schedule
Introduction
Important: Keep engine oil at the proper level
and change as recommended.
Have you purchased the GM Protection Plan? The
Plan supplements your new vehicle warranties.
See your Warranty and Owner Assistance booklet
or your dealer for details.
Maintenance Requirements
Notice:Maintenance intervals, checks,
inspections, replacement parts, and
recommended uids and lubricants as
prescribed in this manual are necessary to
keep your vehicle in good working condition.
Any damage caused by failure to follow
scheduled maintenance may not be covered
by warranty.
514

Your Vehicle and the Environment
Proper vehicle maintenance not only helps to keep
your vehicle in good working condition, but also
helps the environment. All recommended
maintenance is important. Improper vehicle
maintenance can even affect the quality of the air
we breathe. Improper uid levels or the wrong
tire ination can increase the level of emissions
from your vehicle. To help protect our environment,
and to keep your vehicle in good condition, be
sure to maintain your vehicle properly.
Using the Maintenance Schedule
We at General Motors want to help you keep your
vehicle in good working condition. But we do
not know exactly how you will drive it. You may
drive very short distances only a few times a week.
Or you may drive long distances all the time in
very hot, dusty weather. You may use your vehicle
in making deliveries. Or you may drive it to
work, to do errands, or in many other ways.
Because of all the different ways people use their
vehicles, maintenance needs vary. You may need
more frequent checks and replacements. So please
read the following and note how you drive. If you
have any questions on how to keep your vehicle in
good condition, see your GM Goodwrench
®dealer.
515

This schedule is for vehicles that:
carry passengers and cargo within
recommended limits. You will nd these limits
on the Tire and Loading Information label.
SeeLoading Your Vehicle on page 362.
are driven on reasonable road surfaces within
legal driving limits.
are driven off-road in the recommended
manner. SeeOff-Road Driving on page 317.
use the recommended fuel. SeeGasoline
Octane on page 394.
The services inScheduled Maintenance on
page 517should be performed when indicated.
SeeAdditional Required Services on page 520and
Maintenance Footnotes on page 521for further
information.
{CAUTION:
Performing maintenance work on a vehicle
can be dangerous. In trying to do some
jobs, you can be seriously injured. Do your
own maintenance work only if you have the
required know-how and the proper tools
and equipment for the job. If you have any
doubt, see your GM Goodwrench
®dealer to
have a qualied technician do the work.
SeeDoing Your Own Service Work on
page 393.
Some maintenance services can be complex.
So, unless you are technically qualied and have
the necessary equipment, you should have
your GM Goodwrench
®dealer do these jobs.
When you go to your GM Goodwrench
®dealer for
your service needs, you will know that GM-trained
and supported service technicians will perform
the work using genuine GM parts.
516