2010 HUMMER H3 maintenance

9-74 Driving and Operating
Leaving After Parking on a Hill
1. Apply and hold the brake pedalwhile you:
.start the engine,
.shift into a gear, and
.release the parking brake.
2. Let up on the brake pedal.
3. Drive slowly until the trailer is clear of the chocks.
4. Stop and have someone pick up and store the chocks.
Maintenance When Trailer
Towing
The vehicle needs service more
often when pulling a trailer. See this
manual's Maintenance Schedule
or Index for more information.
Things that are especially important
in trailer operation are automatic
transmission fluid, engine oil, axle lubricant, belts, cooling system and
brake system. It is a good idea to
inspect these before and during
the trip.
Check periodically to see that all
hitch nuts and bolts are tight.
Engine Cooling When Trailer
Towing
The cooling system may temporarily
overheat during severe operating
conditions. See
Engine Overheating
on page 10‑22.
Trailer Towing
Three important considerations
have to do with weight:
.The weight of the trailer.
.The weight of the trailer tongue.
.The total weight on the vehicle's
tires.
Weight of the Trailer
How heavy can a trailer safely be?
Speed, altitude, road grades,
outside temperature, special
equipment, and the amount of
tongue weight the vehicle can carry
must be considered. See “Weight of
the Trailer Tongue” later in this
section for more information.
Maximum trailer weight is calculated
assuming only the driver is in the
tow vehicle and it has all the
required trailering equipment.
The weight of additional optional
equipment, passengers and cargo in
the tow vehicle must be subtracted
from the maximum trailer weight.
Use the following chart to determine
how much a vehicle can weigh,
based on the vehicle model and
options.

10-4 Vehicle Care
Vehicle Checks
Doing Your Own
Service Work
{WARNING
You can be injured and the
vehicle could be damaged if you
try to do service work on a vehicle
without knowing enough about it.
.Be sure you have sufficient
knowledge, experience,
the proper replacement
parts, and tools before
attempting any vehicle
maintenance task.(Continued)
WARNING (Continued)
.Be sure to use the proper
nuts, bolts, and other
fasteners. English and
metric fasteners can be
easily confused. If the wrong
fasteners are used, parts can
later break or fall off. You
could be hurt.
If doing some of your own service
work, use the proper service
manual. It tells you much more about how to service the vehicle
than this manual can. To order the
proper service manual, see
Service
Publications Ordering Informationon
page 13‑12.
This vehicle has an airbag system.
Before attempting to do your own
service work, see Airbag System
Check on page 3‑41.
Keep a record with all parts receipts
and list the mileage and the date of
any service work performed. See
Maintenance Records
on
page 11‑11.

10-12 Vehicle Care
After changing the engine oil, reset
the system:
1. Turn the ignition key to ON/RUNwith the engine off.
2. Press and release the stem in the lower center of the
instrument cluster until the OIL
LIFE message is displayed.
3. Once the alternating “Oil Life”
and “Reset” messages appear,
press and hold the stem until
several beeps sound. This
confirms that the oil life system
has been reset.
4. Turn the key to LOCK/OFF.
If the “Change Oil” message
comes on again and stays on for
30 seconds at the next ignition
cycle, it did not reset. The system
needs to be reset again.What to Do with Used Oil
Used engine oil contains certain
elements that can be unhealthy for
your skin and could even cause
cancer. Do not let used oil stay on
your skin for very long. Clean your
skin and nails with soap and water,
or a good hand cleaner. Wash or
properly dispose of clothing or rags
containing used engine oil. See the
manufacturer's warnings about the
use and disposal of oil products.
Used oil can be a threat to the
environment. If you change your
own oil, be sure to drain all the oil
from the filter before disposal. Never
dispose of oil by putting it in the
trash, pouring it on the ground, into
sewers, or into streams or bodies of
water. Recycle it by taking it to a
place that collects used oil.
Automatic Transmission
Fluid
When to Check and Change
Automatic Transmission Fluid
A good time to check the automatic
transmission fluid level is when the
engine oil is changed.
Change the fluid and filter at the
intervals listed in Scheduled
Maintenance
on page 11‑2, and be
sure to use the transmission fluid
listed in Recommended Fluids and
Lubricants on page 11‑8.
How to Check Automatic
Transmission Fluid
Because this operation can be a
little difficult, you may choose to
have this done at the dealer service
department.
If adding it yourself, be sure to
follow all the instructions here,
or there could be a false reading on
the dipstick.

10-14 Vehicle Care
Then, without shutting off the
engine:
1. Flip the handle up and then pullout the dipstick and wipe it with
a clean rag or paper towel.
The automatic transmission
dipstick handle with this symbol
on it is located in the engine
compartment on the passenger
side of the vehicle.
See Engine Compartment
Overview
on page 10‑6for
more information on location.
2. Push it back in all the way, wait three seconds, and pull it back
out again.
3. Check both sides of the dipstick,
and read the lower level. The
fluid level must be in the COLD
area, below the cross-hatched
area, for a cold check or in the
HOT or cross-hatched area for a
hot check. Be sure to keep the
dipstick pointed down to get an
accurate reading.
4. If the fluid level is in the acceptable range, push the
dipstick back in all the way; then
flip the handle down to lock the
dipstick in place.
How to Add Automatic
Transmission Fluid
Refer to the Maintenance
Schedule to determine what kind
of transmission fluid to use. See
Recommended Fluids and
Lubricants on page 11‑8.
Add fluid only after checking the
transmission fluid while it is hot.
A cold check is used only as a
reference. If the fluid level is low,
add only enough of the proper fluid
to bring the level up to the HOT area
for a hot check. It does not take
much fluid, generally less than one
pint (0.5 L). Do not overfill.

10-16 Vehicle Care
4. If the fluid level is good, installthe plug and be sure it is fully
seated. If the fluid level is low,
add more fluid as described in
the next steps.
How to Add Fluid
Refer to the Maintenance Schedule
to determine what kind of fluid to
use. See Recommended Fluids and
Lubricants on page 11‑8.
1. Remove the filler plug.
2. Add fluid at the filler plug hole. Add only enough fluid to bring
the fluid level up to the bottom of
the filler plug hole.
3. Install the filler 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 filled
with hydraulic clutch fluid.
The hydraulic clutch fluid reservoir
cap has this symbol on it. See
Engine Compartment Overview
on
page 10‑6for reservoir location.
It is not necessary to regularly
check clutch fluid unless a leak in
the system is suspected. Adding
fluid will not correct a leak.
A fluid 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 fluid level in the clutch master
cylinder reservoir and for the proper
fluid. See Recommended Fluids and
Lubricants on page 11‑8.
How to Check and Add Fluid
The proper fluid 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.

Vehicle Care 10-17
Engine Air Cleaner/Filter
3.7 L shown (5.3 L similar)
The engine air cleaner/filter is
located in the engine compartment
on the passenger side of the
vehicle. See Engine Compartment
Overview
on page 10‑6for more
information on location.
When to Inspect the Engine Air
Cleaner/Filter
Inspect the air cleaner/filter at the
Maintenance IIintervals and replace
it at the first oil change after each
80 000 km (50,000 mile) interval.
See Scheduled Maintenance
on
page 11‑2for more information.
If you are driving in dusty/dirty
conditions, inspect the filter at each
engine oil change.
How to Inspect the Engine Air
Cleaner/Filter
To inspect or replace the engine air
cleaner/filter:
1. Unfasten the clips that hold the cover on and remove the cover.
2. Lift out the engine air cleaner/filter. 3. Inspect or replace the air filter.
See Maintenance Replacement
Parts
on page 11‑10to determine
which filter to use.
4. Reinstall the engine air cleaner/filter cover. Fasten the
clips to hold the cover in place.
{WARNING
Operating the engine with the air
cleaner/filter off can cause you
or others to be burned. The air
cleaner not only cleans the air; it
helps to stop flames if the engine
backfires. Use caution when
working on the engine and do not
drive with the air cleaner/filter off.
Notice: If the air cleaner/filter is
off, dirt can easily get into the
engine, which could damage it.
Always have the air cleaner/filter
in place when you are driving.

10-32 Vehicle Care
Wiper Blade Replacement
Windshield wiper blades should be
inspected for wear and cracking.
SeeScheduled Maintenance
on
page 11‑2for more information.
Replacement blades come in
different types and are removed
in different ways. For proper type
and length, see Maintenance
Replacement Parts on page 11‑10. 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.

Vehicle Care 10-53
Please note that the TPMS is
not a substitute for proper tire
maintenance, and it is the driver's
responsibility to maintain correct tire
pressure, even if under‐inflation
has not reached the level to trigger
illumination of the TPMS low tire
pressure telltale.
Your vehicle has also been
equipped with a TPMS malfunction
indicator to indicate when the
system is not operating properly.
The TPMS malfunction indicator is
combined with the low tire pressure
telltale. When the system detects a
malfunction, the telltale will flash for
approximately one minute and then
remain continuously illuminated.
This sequence will continue upon
subsequent vehicle start‐ups as
long as the malfunction exists.
When the malfunction indicator
is illuminated, the system may
not be able to detect or signal
low tire pressure as intended.TPMS malfunctions may occur for
a variety of reasons, including the
installation of replacement or
alternate tires or wheels on the
vehicle that prevent the TPMS
from functioning properly. Always
check the TPMS malfunction
telltale after replacing one or more
tires or wheels on your vehicle to
ensure that the replacement or
alternate tires and wheels allow
the TPMS to continue to function
properly.
See
Tire Pressure Monitor
Operation
on page 10‑53for
additional information.
Federal Communications
Commission (FCC) and
Industry Canada
See Radio Frequency Statementon
page 13‑16for information
regarding Part 15 of the Federal
Communications Commission (FCC)
Rules and RSS-210/211 of Industry
Canada.
Tire Pressure Monitor
Operation
This vehicle may have a Tire
Pressure Monitor System (TPMS).
The TPMS is designed to warn the
driver when a low tire pressure
condition exists. TPMS sensors are
mounted onto each tire and wheel
assembly on the vehicle, excluding
the spare tire. The TPMS sensors
monitor the air pressure in the
vehicle's tires and transmit the tire
pressure readings to a receiver
located in the vehicle.
When a low tire pressure
condition is detected, the TPMS
illuminates the low tire pressure
warning light located on the
instrument panel cluster.