check engine HUMMER H3 2009 Owner's Guide

3. Check that the lubricant level
is up to the bottom of the ller
plug hole.
4. If the uid level is good, install
the plug and be sure it is fully
seated. If the uid level is low,
add more uid as described
in the next steps.
How to Add Fluid
Refer to the Maintenance Schedule
to determine what kind of uid to
use. SeeRecommended Fluids and
Lubricants on page 6-12.
1. Remove the ller plug.
2. Add uid at the ller plug hole.
Add only enough uid to bring
the uid level up to the bottom of
the ller plug hole.
3. Install the ller plug. Be sure the
plug is fully seated.
Hydraulic Clutch
The hydraulic clutch linkage in
the vehicle is self-adjusting.
The clutch master cylinder reservoir
is lled with hydraulic clutch uid.
The hydraulic clutch uid reservoir
cap has this symbol on it. See
Engine Compartment Overview on
page 5-10for reservoir location.
It is not necessary to regularly check
clutch uid unless a leak in the
system is suspected. Adding uid
will not correct a leak.
A uid loss in this system could
indicate a problem. Have the system
inspected and repaired.
When to Check and What
to Use
Refer to the Maintenance Schedule
to determine how often to check
the uid level in the clutch master
cylinder reservoir and for the proper
uid. SeeRecommended Fluids
and Lubricants on page 6-12.
How to Check and Add Fluid
The proper uid should be added
if the level does not reach the
bottom of the diaphragm when it is
in place in the reservoir. See the
instructions on the reservoir cap.
Service and Appearance Care 5-21

Engine Coolant
The cooling system in the vehicle
is lled with DEX-COOL®engine
coolant. This coolant is designed to
remain in the vehicle for ve years
or 150,000 miles (240 000 km),
whichever occurs rst.
The following explains the cooling
system and how to check and
add coolant when it is low.
If there is a problem with engine
overheating, seeEngine
Overheating on page 5-27.
What to Use
{CAUTION
Adding only plain water to the
cooling system can be dangerous.
Plain water, or some other liquid
such as alcohol, can boil before
the proper coolant mixture will.
(Continued)
CAUTION (Continued)
The vehicle’s coolant warning
system is set for the proper
coolant mixture. With plain water
or the wrong mixture, the engine
could get too hot but you would
not get the overheat warning.
The engine could catch re and
you or others could be burned.
Use a 50/50 mixture of clean,
drinkable water and DEX-COOL
®
coolant.
Use a 50/50 mixture of clean,
drinkable water and DEX-COOL
coolant. If using this mixture,
nothing else needs to be added.
This mixture:
Gives freezing protection down
to−34°F (−37°C), outside
temperature.
Gives boiling protection up to
265°F (129°C), engine
temperature.
Protects against rust and
corrosion.
Will not damage aluminum parts.
Helps keep the proper engine
temperature.
Notice:If an improper coolant
mixture is used, the engine could
overheat and be badly damaged.
The repair cost would not be
covered by the vehicle warranty.
Too much water in the mixture
can freeze and crack the engine,
radiator, heater core, and
other parts.
Notice:If extra inhibitors
and/or additives are used in the
vehicle’s cooling system, the
vehicle could be damaged.
Use only the proper mixture of
the engine coolant listed in
this manual for the cooling
system. SeeRecommended
Fluids and Lubricants on
page 6-12for more information.
Service and Appearance Care 5-23

Checking Coolant
The vehicle must be on a level
surface when checking the
coolant level.
The coolant recovery tank cap has
this symbol on it.
It is located toward the rear of
the engine compartment on
the passenger side of the vehicle.
SeeEngine Compartment Overview
on page 5-10for more information
on location.
Check to see if coolant is visible in
the coolant recovery tank. If the
coolant inside the coolant recovery
tank is boiling, do not do anythingelse until it cools down. If coolant is
visible but the coolant level is not
at or above the FULL COLD
mark, add a 50/50 mixture of clean,
drinkable water and DEX-COOL
coolant at the coolant recovery tank,
but be sure the cooling system is
cool before this is done.
The vehicle must be on a level
surface. When the engine is cold,
the coolant level should be at FULL
COLD, or a little higher. When
the engine is warm, the level could
be above the FULL COLD level.
When the engine is cold, the coolant
level should be at least up to the
FULL COLD mark. If it is not, there
could be a leak in the cooling
system.
How to Add Coolant to the
Recovery Tank
{CAUTION
You can be burned if you spill
coolant on hot engine parts.
Coolant contains ethylene glycol
and it will burn if the engine parts
are hot enough. Do not spill
coolant on a hot engine.
Notice:This vehicle has a
specic coolant ll procedure.
Failure to follow this procedure
could cause the engine to
overheat and be severely
damaged.
When the coolant in the coolant
recovery tank is at the FULL COLD
mark, start the vehicle.
If coolant is needed, add the proper
DEX-COOL coolant mixture at
the coolant recovery tank.
5-24 Service and Appearance Care

Engine Overheating
The vehicle has an indicator to warn
of engine overheating.
A coolant temperature gage is
displayed on the instrument panel.
SeeEngine Coolant Temperature
Gage on page 3-29.
You may decide not to lift the hood
when this warning appears, but
instead get service help right away.
SeeRoadside Service on page 7-6.
If you do decide to lift the hood,
make sure the vehicle is parked on
a level surface.
Then check to see if the engine
cooling fans are running. If the
engine is overheating, both fans
should be running. If they are not, do
not continue to run the engine and
have the vehicle serviced.The air conditioning might stop
working if the engine is too hot.
This is normal and helps cool the
engine.
Notice:Engine damage from
running the engine without
coolant is not covered by the
warranty.
Notice:If the engine catches re
because of being driven with
no coolant, your vehicle can be
badly damaged. The costly
repairs would not be covered by
the vehicle warranty.
If Steam Is Coming From The
Engine Compartment
{CAUTION
Steam from an overheated engine
can burn you badly, even if you
just open the hood. Stay away
from the engine if you see or hear
steam coming from it. Just turn it
off and get everyone away from
the vehicle until it cools down.
Wait until there is no sign of
steam or coolant before you
open the hood.
If you keep driving when your
engine is overheated, the liquids
in it can catch re. You or others
could be badly burned. Stop your
engine if it overheats, and get
out of the vehicle until the engine
is cool.
Service and Appearance Care 5-27

Power Steering Fluid
SeeEngine Compartment Overview
on page 5-10for reservoir location.
When to Check Power
Steering Fluid
It is not necessary to regularly
check power steering uid unless a
leak in the system is suspected
or an unusual noise is heard. A uid
loss in this system could indicate
a problem. Have the system
inspected and repaired.
How to Check Power
Steering Fluid
1. Turn the key off and let the
engine compartment cool down.
2. Wipe the cap and the top of the
reservoir clean.
3. Unscrew the cap and wipe the
dipstick with a clean rag.
4. Replace the cap and completely
tighten it.
5. Then remove the cap again and
look at the uid level on the
dipstick.
The level should be between the
ADD and FULL marks. If necessary,
add only enough uid to bring the
level up to the proper range.
What to Use
To determine what kind of uid to
use, seeRecommended Fluids and
Lubricants on page 6-12. Always
use the proper uid.
Notice:Use of the incorrect uid
may damage the vehicle and
the damages may not be covered
by the vehicle’s warranty.
Always use the correct uid
listed inRecommended Fluids
and Lubricants on page 6-12.
Service and Appearance Care 5-29

Do not top off the brake uid. Adding
uid does not correct a leak. If uid is
added when the linings are worn,
there will be too much uid when new
brake linings are installed. Add or
remove brake uid, as necessary,
only when work is done on the brake
hydraulic system.
{CAUTION
If too much brake uid is added,
it can spill on the engine and
burn, if the engine is hot enough.
You or others could be burned,
and the 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 the
brake uid. SeeScheduled
Maintenance on page 6-4.
Checking Brake Fluid
Check brake uid by looking at the
brake uid reservoir. SeeEngine
Compartment Overview on
page 5-10.
The uid level should be above
MIN. If it is not, have the brake
hydraulic system checked to see
if there is a leak.
After work is done on the brake
hydraulic system, make sure the
level is above the MIN but not over
the MAX mark.
What to Add
Use only new DOT-3 brake uid
from a sealed container. See
Recommended Fluids and
Lubricants on page 6-12.
Always clean the brake uid
reservoir cap and the area around
the cap before removing it. This
helps keep dirt from entering
the reservoir.{CAUTION
With the wrong kind of uid in the
brake hydraulic system, the brakes
might not work well. This could
cause a crash. Always use the
proper brake uid.
Notice:
Using the wrong uid can badly
damage brake hydraulic system
parts. For example, just a few
drops of mineral-based oil,
such as engine oil, in the brake
hydraulic system can damage
brake hydraulic system parts so
badly that they will have to be
replaced. Do not let someone
put in the wrong kind of uid.
If brake uid is spilled on the
vehicle’s painted surfaces, the
paint nish can be damaged.
Be careful not to spill brake uid
on the vehicle. If you do, wash it
off immediately. SeeWashing
Your Vehicle on page 5-86.
Service and Appearance Care 5-31

{CAUTION
Fans or other moving engine
parts can injure you badly. Keep
your hands away from moving
parts once the engine is running.
5. Check that the jumper cables
do not have loose or missing
insulation. If they do, you could
get a shock. The vehicles
could be damaged too.
Before you connect the cables,
here are some basic things
you should know. Positive (+) will
go to positive (+) or to a
remote positive (+) terminal if the
vehicle has one. Negative (−)
will go to a heavy, unpainted
metal engine part or to a remote
negative (−) terminal if the
vehicle has one.Do not connect positive (+) to
negative (−) or you will get
a short that would damage the
battery and maybe other
parts too. And do not connect
the negative (−) cable to
the negative (−) terminal on the
dead battery because this
can cause sparks.
6. Connect the red positive (+)
cable to the positive (+) terminal
of the dead battery. Use a
remote positive (+) terminal if the
vehicle has one.
7. Do not let the other end touch
metal. Connect it to the
positive (+) terminal of the
good battery. Use a remote
positive (+) terminal if the
vehicle has one.8. Now connect the black
negative (−) cable to the
negative (−) terminal of the
good battery. Use a remote
negative (−) terminal if the
vehicle has one.
Do not let the other end touch
anything until the next step.
The other end of the negative (−)
cable does not go to the dead
battery. It goes to a heavy,
unpainted metal engine part,
or to a remote negative (−)
terminal on the vehicle with
the dead battery.
9. Connect the other end of the
negative (−) cable at least
18 inches (45 cm) away from
the dead battery, but not
near engine parts that move.
The electrical connection is just
as good there, and the chance
of sparks getting back to the
battery is much less.
Your vehicle has a remote
negative (−) terminal, marked
GND (Ground), for this purpose.
5-36 Service and Appearance Care

Maintenance
Schedule
Maintenance Schedule
Introduction.........................6-1
Maintenance
Requirements....................6-2
Your Vehicle and the
Environment......................6-2
Using the Maintenance
Schedule...........................6-2
Scheduled Maintenance......6-4
Additional Required
Services............................6-6
Maintenance Footnotes.......6-7
Owner Checks and
Services............................6-9
At Each Fuel Fill................6-9
At Least Once a Month......6-9
At Least Once a Year.......6-10
Recommended Fluids and
Lubricants.......................6-12
Maintenance
Replacement Parts..........6-14
Engine Drive Belt Routing. . .6-15
Maintenance Record.........6-16
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 the vehicle warranties.
See the Warranty and Owner
Assistance booklet or your
dealer/retailer for details.
Maintenance Schedule 6-1

Scheduled Maintenance
When the CHANGE OIL message
displays in the Driver Information
Center (DIC), service is required for
the vehicle. SeeDIC Warnings
and Messages on page 3-37. Have
the vehicle serviced as soon as
possible within the next 600 miles
(1 000 km). It is possible that, if
driving under the best conditions,
the engine oil life system may
not indicate that vehicle service is
necessary for over a year. However,
the engine oil and lter must be
changed at least once a year and
at this time the system must be
reset. Your dealer/retailer has
trained service technicians who will
perform this work using genuine
parts and reset the system.If the engine oil life system is ever
reset accidentally, service the
vehicle within 3,000 miles
(5 000 km) since the last service.
Remember to reset the oil life
system whenever the oil is changed.
SeeEngine Oil Life System on
page 5-15for information on
the Engine Oil Life System and
resetting the system.
When the CHANGE OIL message
appears, certain services, checks,
and inspections are required.
Required services are described in
the following for “MaintenanceI”
and “MaintenanceII.” Generally, it is
recommended that the rst service
be MaintenanceI, the second
service be MaintenanceII, and then
alternate MaintenanceIand
MaintenanceIIthereafter. However,
in some cases, MaintenanceII
may be required more often.MaintenanceI—Use
MaintenanceIif the CHANGE
OIL message displays within
10 months since the vehicle was
purchased or MaintenanceII
was performed.
MaintenanceII—Use
MaintenanceIIif the previous
service performed was
MaintenanceI. Always use
MaintenanceIIwhenever the
message displays 10 months or
more since the last service or if the
message has not come on at all
for one year.
6-4 Maintenance Schedule

Scheduled Maintenance
ServiceMaintenanceIMaintenance II
Change engine oil and lter. See Engine Oil on page 5-13. Reset oil life system.
See Engine Oil Life System on page 5-15 .An Emission Control Service. ••
Lubricate chassis components. See footnote #. ••
Visually check for any leaks or damage. See footnote (j). ••
Inspect engine air cleaner lter. If necessary, replace lter. See Engine Air
Cleaner/Filter on page 5-17 . •
Rotate tires and check ination pressures and wear. See Tire Inspection and
Rotation on page 5-57 and “Tire Wear Inspection” in At Least Once a Month
on page 6-9. ••
Inspect brake system. See footnote (a). ••
Check engine coolant and windshield washer uid levels and add uid as
needed. ••
Perform any needed additional services. See “Additional Required Services”
in this section. ••
Inspect suspension and steering components. See footnote (b). •
Inspect engine cooling system. See footnote (c). •
Inspect wiper blades. See footnote (d). •
Inspect restraint system components. See footnote (e). •
Lubricate body components. See footnote (f). •
Check transmission uid level and add uid as needed. •
Maintenance Schedule 6-5