2009 HUMMER H3 fuel pressure

(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

Ination - Tire Pressure
Tires need the correct amount of
air pressure to operate effectively.
Notice:Do not let anyone tell
you that under-ination or
over-ination is all right. It is
not. If your tires do not have
enough air (under-ination),
you can get the following:
Too much exing
Too much heat
Tire overloading
Premature or irregular wear
Poor handling
Reduced fuel economy
If your tires have too much air
(over-ination), you can get
the following:
Unusual wear
Poor handling
Rough ride
Needless damage from road
hazardsA vehicle specic Tire and
Loading Information label is
attached to your vehicle.
This label shows your vehicle’s
original equipment tires and
the correct ination pressures for
your tires when they are cold.
The recommended cold tire
ination pressure, shown on the
label, is the minimum amount
of air pressure needed to
support your vehicle’s maximum
load carrying capacity.
For additional information
regarding how much weight your
vehicle can carry, and an
example of the Tire and Loading
Information label, seeLoading
the Vehicle on page 4-35.
How you load your vehicle
affects vehicle handling and ride
comfort. Never load your vehicle
with more weight than it was
designed to carry.When to Check
Check your tires once a month
or more. Also check the tire
pressure of the spare tire. If your
vehicle has a compact spare
tire, it should be at 60 psi
(420 kPa). SeeSpare Tire on
page 5-82for additional
information.
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 are 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).
Service and Appearance Care 5-51

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 ination 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 Pressure Monitor
System
The Tire Pressure Monitor System
(TPMS) uses radio and sensor
technology to check tire pressure
levels. The TPMS sensors monitor
the air pressure in your vehicle’s
tires and transmit tire pressure
readings to a receiver located in
the vehicle.
Each tire, including the spare
(if provided), should be checked
monthly when cold and inated to
the ination pressure recommended
by the vehicle manufacturer on
the vehicle placard or tire ination
pressure label. (If your vehicle
has tires of a different size than
the size indicated on the vehicle
placard or tire ination pressure
label, you should determine the
proper tire ination pressure
for those tires.)As an added safety feature, your
vehicle has been equipped with
a tire pressure monitoring system
(TPMS) that illuminates a low
tire pressure telltale when one or
more of your tires is signicantly
under-inated.
Accordingly, when the low tire
pressure telltale illuminates, you
should stop and check your tires as
soon as possible, and inate them
to the proper pressure. Driving on a
signicantly under-inated tire
causes the tire to overheat and can
lead to tire failure. Under-ination
also reduces fuel efficiency and tire
tread life, and may affect the
vehicle’s handling and stopping
ability.
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-ination
has not reached the level to trigger
illumination of the TPMS low tire
pressure telltale.
5-52 Service and Appearance Care

(d)Inspect wiper blades for wear,
cracking, or contamination.
Clean the windshield and wiper
blades, if contaminated. Replace
wiper blades that are worn or
damaged. See Windshield Wiper
Blade Replacement on page 5-44
and Windshield, Backglass,
and Wiper Blades on page 5-87
for more information.
(e)Make sure the safety belt
reminder light and safety belt
assemblies are working properly.
Look for any other loose or
damaged safety belt system parts.
If you see anything that might
keep a safety belt system from doing
its job, have it repaired. Have any
torn or frayed safety belts replaced.
Also see Checking the Restraint
Systems on page 1-60.
(f)Lubricate all key lock cylinders,
hood latch assembly, secondary
latch, pivots, spring anchor, release
pawl, rear compartment hinges,
outer endgate handle pivot points,
rear door detent link, rollermechanism, endgate handle pivot
points, latch bolt, fuel door hinge,
locks, and folding seat hardware.
More frequent lubrication may
be required when exposed to a
corrosive environment. Applying
silicone grease on weatherstrips
with a clean cloth will make
them last longer, seal better, and
not stick or squeak.
(g)Check vent hose at transfer
case for kinks and proper
installation.
(h)Change automatic transmission
fluid and filter if the vehicle is
mainly driven under one or more of
these conditions:
In heavy city traffic where the
outside temperature regularly
reaches 90°F (32°C) or higher.
In hilly or mountainous terrain.
When doing frequent trailer
towing.
Uses such as found in taxi,
police, or delivery service.(i)Drain, flush, and refill cooling
system. This service can be
complex; you should have your
dealer/retailer perform this service.
See Engine Coolant on page 5-23
for what to use. Inspect hoses.
Clean radiator, condenser,
pressure cap, and filler neck.
Pressure test the cooling system
and pressure cap.
(j)A fluid loss in any vehicle system
could indicate a problem. Have the
system inspected and repaired
and the fluid level checked. Add fluid
if needed.
(k)Visually inspect belt for fraying,
excessive cracks, or obvious
damage. Replace belt if necessary.
6-8 Maintenance Schedule

Owner Checks and
Services
These owner checks and services
should be performed at the
intervals specied to help ensure
vehicle safety, dependability,
and emission control performance.
Your dealer/retailer can assist
with these checks and services.
Be sure any necessary repairs are
completed at once. Whenever
any uids or lubricants are added
to the vehicle, make sure they
are the proper ones, as shown
inRecommended Fluids and
Lubricants on page 6-12.
At Each Fuel Fill
It is important to perform these
underhood checks at each fuel fill.
Engine Oil Level Check
Notice:It is important to check
the engine oil regularly and
keep it at the proper level.
Failure to keep the engine oil
at the proper level can cause
damage to the engine not covered
by the vehicle warranty.
Check the engine oil level and
add the proper oil if necessary.
SeeEngine Oil on page 5-13.
Engine Coolant Level Check
Check the engine coolant level
and add DEX-COOL®coolant
mixture if necessary. SeeEngine
Coolant on page 5-23.
Windshield Washer Fluid
Level Check
Check the windshield washer uid
level in the windshield washer
uid reservoir and add the proper
uid if necessary.
At Least Once a Month
Tire Ination Check
Inspect the vehicle’s tires and make
sure they are inated to the correct
pressures. Do not forget to check
the spare tire. SeeInflation - Tire
Pressure on page 5-51. Check to
make sure the spare tire is stored
securely. SeeChanging a Flat Tire
on page 5-66.
Tire Wear Inspection
Tire rotation may be required for
high mileage highway drivers prior to
the Engine Oil Life System service
notication. Check the tires for
wear and, if necessary, rotate the
tires. SeeTire Inspection and
Rotation on page 5-57.
Maintenance Schedule 6-9

Fuel (cont.)
Filling a Portable Fuel
Container....................... 5-8
Filling the Tank.................. 5-7
Fuels in Foreign Countries . . . 5-7
Gage ..............................3-33
Gasoline Octane................ 5-5
Gasoline Specications........ 5-5
Fuses
Engine Compartment
Fuse Block...................5-92
Fuses and Circuit
Breakers......................5-91
Windshield Wiper..............5-91
G
Gage
Engine Coolant
Temperature.................3-29
Fuel................................3-33
Speedometer...................3-24
Tachometer......................3-24
Garage Door Opener............2-42Gasoline
Octane............................. 5-5
Specications..................... 5-5
Glove Box...........................2-47
GM Mobility Reimbursement
Program............................ 7-5
H
Hazard Warning Flashers........ 3-5
Head Restraints..................... 1-2
Headlamp
Aiming ............................5-39
Headlamps..........................5-41
Bulb Replacement.............5-41
Daytime Running Lamp.....3-13
Exterior Lamps.................3-11
Flash-to-Pass..................... 3-7
Halogen Bulbs..................5-41
High/Low Beam Changer..... 3-7
On Reminder...................3-13
Heated Seats........................ 1-4
Heater................................3-19
Engine Coolant.................2-19
Highbeam On Light..............3-33Highway Hypnosis................4-30
Hill and Mountain Roads.......4-30
Hood
Checking Things Under....... 5-9
Release............................ 5-9
Horn .................................... 3-5
How to Wear Safety Belts
Properly..........................1-14
Hydraulic Clutch...................5-21
I
Ignition Positions..................2-16
Infants and Young Children,
Restraints........................1-28
Ination - Tire Pressure.........5-51
Instrument Panel
Brightness.......................3-15
Cluster............................3-23
Overview........................... 3-4
INDEX i-5

J
Jump Starting......................5-34
K
Keyless Entry System............ 2-3
Keys.................................... 2-2
L
Labeling, Tire Sidewall..........5-45
Lamp
Malfunction Indicator.........3-30
Lamps
Dome .............................3-16
Dome Lamp Override........3-16
Off-Road .........................3-14
Reading..........................3-16
Lap-Shoulder Belt................1-20
LATCH System for Child
Restraints........................1-34
License Plate Lamps............5-43Light
Airbag Readiness.............3-25
Antilock Brake System
(ABS) Warning..............3-28
Brake System Warning......3-27
Charging System..............3-27
Cruise Control..................3-33
Highbeam On...................3-33
Oil Pressure.....................3-32
Passenger Airbag Status
Indicator.......................3-26
Safety Belt Reminders.......3-24
Security...........................3-33
StabiliTrak
®/Traction
Control System (TCS)
Warning Light...............3-29
Tire Pressure...................3-30
Up-Shift...........................3-27
Lighting
Exit................................3-16
Lights
Exterior Lamps.................3-11
Flash-to-Pass..................... 3-7
High/Low Beam Changer..... 3-7
On Reminder...................3-13Loading Your Vehicle............4-35
Locking Rear Axle................. 4-8
Lockout Protection................. 2-7
Locks
Door ................................. 2-5
Lockout Protection.............. 2-7
Power Door....................... 2-6
Programmable Automatic
Door Locks.................... 2-6
Rear Door Security Locks.... 2-6
Loss of Control....................4-12
Lower Anchors and Tethers
for Children......................1-34
Luggage Carrier...................2-48
Lumbar
Manual Controls................. 1-4
Power Controls.................. 1-4
M
Maintenance Schedule
Additional Required
Services........................ 6-6
At Each Fuel Fill................ 6-9
At Least Once a Month....... 6-9
At Least Once a Year.......6-10
i-6 INDEX