sensor HUMMER H3 2009 Owners Manual

Frontal airbags may inate at
different crash speeds. For example:
If the vehicle hits a stationary
object, the airbags could inate at
a different crash speed than if the
vehicle hits a moving object.
If the vehicle hits an object that
deforms, the airbags could inate
at a different crash speed than if
the vehicle hits an object that
does not deform.
If the vehicle hits a narrow object
(like a pole), the airbags could
inate at a different crash speed
than if the vehicle hits a wide
object (like a wall).
If the vehicle goes into an object
at an angle, the airbags could
inate at a different crash speed
than if the vehicle goes straight
into the object.
Thresholds can also vary with
specic vehicle design.
Frontal airbags are not intended to
inate during vehicle rollovers, rear
impacts, or in many side impacts.In addition, the vehicle has
dual-stage frontal airbags.
Dual-stage airbags adjust the
restraint according to crash severity.
The vehicle has electronic frontal
sensors, which help the sensing
system distinguish between a
moderate frontal impact and a
more severe frontal impact.
For moderate frontal impacts,
dual-stage airbags inate at a
level less than full deployment.
For more severe frontal impacts,
full deployment occurs.
The vehicle may or may not have
seat-mounted side impact airbags.
The vehicle has roof-rail airbags.
SeeAirbag System on page 1-46.
Seat-mounted side impact and
roof-rail airbags are intended
to inate in moderate to severe side
crashes. In addition, these roof-rail
airbags are intended to inate during
a rollover or in a severe frontal
impact. Seat-mounted side impact
and roof-rail airbags will inate if
the crash severity is above thesystem’s designed threshold level.
The threshold level can vary
with specic vehicle design.
Seat-mounted side impact airbags
are not intended to inate in frontal
impacts, near-frontal impacts,
rollovers, or rear impacts. Roof-rail
airbags are not intended to inate in
rear impacts. A seat-mounted side
impact airbag is intended to deploy
on the side of the vehicle that is
struck. Both roof-rail airbags will
deploy when either side of the
vehicle is struck, or if the sensing
system predicts that the vehicle is
about to roll over, or in a severe
frontal impact.
In any particular crash, no one
can say whether an airbag should
have inated simply because of the
damage to a vehicle or because
of what the repair costs were.
For frontal airbags, ination is
determined by what the vehicle
hits, the angle of the impact, and
how quickly the vehicle slows down.
For seat-mounted side impact and
roof-rail airbags, deployment is
Seats and Restraint System 1-51

Passenger Sensing
System
The vehicle has a passenger sensing
system for the right front passenger
position. The passenger airbag
status indicator will be visible on the
instrument panel when the vehicle
is started.
The words ON and OFF, or the
symbol for on and off, are visible
during the system check. When the
system check is complete, the
word ON or OFF, or the symbol foron or off, will be visible. See
Passenger Airbag Status Indicator
on page 3-26.
The passenger sensing system will
turn off the right front passenger
frontal airbag and seat-mounted side
impact airbag (if equipped) under
certain conditions. The driver
airbags and the roof-rail airbags are
not affected by the passenger
sensing system.
The passenger sensing system
works with sensors that are part of
the right front passenger seat and
safety belt. The sensors are
designed to detect the presence of a
properly-seated occupant and
determine if the right front passenger
frontal airbag and seat-mounted side
impact airbag (if equipped) should be
enabled (may inate) or not.
According to accident statistics,
children are safer when properly
secured in a rear seat in the
correct child restraint for their
weight and size.We recommend that children be
secured in a rear seat, including: an
infant or a child riding in a rear-facing
child restraint; a child riding in a
forward-facing child seat; an older
child riding in a booster seat; and
children, who are large enough,
using safety belts.
A label on the sun visor says,
“Never put a rear-facing child seat
in the front.” This is because the risk
to the rear-facing child is so great,
if the airbag deploys.
{CAUTION
A child in a rear-facing child
restraint can be seriously injured or
killed if the right front passenger
airbag inates. This is because
the back of the rear-facing child
restraint would be very close to
the inating airbag. A child in a
forward-facing child restraint can
(Continued) United States
Canada
1-54 Seats and Restraint System

seats, safety belts, the airbag
sensing and diagnostic module,
steering wheel, instrument panel,
roof-rail airbag modules, ceiling
headliner or pillar garnish trim,
overhead console, front sensors,
side impact sensors, rollover
sensor module, or airbag wiring
can affect the operation of the
airbag system.
In addition, the vehicle has a
passenger sensing system for the
right front passenger position,
which includes sensors that are
part of the passenger seat.
The passenger sensing system
may not operate properly if the
original seat trim is replaced with
non-GM covers, upholstery or
trim, or with GM covers,
upholstery or trim designed for a
different vehicle. Any object, such
as an aftermarket seat heater or a
comfort enhancing pad or device,
installed under or on top of theseat fabric, could also interfere
with the operation of the
passenger sensing system.
This could either prevent proper
deployment of the passenger
airbag(s) or prevent the
passenger sensing system from
properly turning off the passenger
airbag(s). SeePassenger
Sensing System on page 1-54.
If you have any questions, call
Customer Assistance. The phone
numbers and addresses for
Customer Assistance are in
Step Two of the Customer
Satisfaction Procedure in this
manual. SeeCustomer
Satisfaction Procedure on
page 7-1.
If the vehicle has rollover
roof-rail airbags, seeDifferent
Size Tires and Wheels on
page 5-61for additional
important information.Q:Because I have a disability,
I have to get my vehicle
modied. How can I nd out
whether this will affect my
airbag system?
A:If you have questions, call
Customer Assistance. The phone
numbers and addresses for
Customer Assistance are in
Step Two of the Customer
Satisfaction Procedure in this
manual. SeeCustomer
Satisfaction Procedure on
page 7-1.
In addition, your dealer/retailer and
the service manual have information
about the location of the airbag
sensors, sensing and diagnostic
module and airbag wiring.
Seats and Restraint System 1-59

Mirrors
Automatic Dimming
Rearview Mirror
The vehicle has an automatic
dimming rearview mirror with a
compass and temperature display.
Vehicles with OnStar
®have
three additional control buttons for
the OnStar
®system. See your
dealer/retailer for more information
about OnStar
®and how to
subscribe to it. SeeOnStar®
System on page 2-39for more
information about the services
OnStar
®provides.
z(On/Off):Press to turn the
dimming feature on or off.
The vehicle may also have a Rear
Vision Camera (RVC). SeeRear
Vision Camera (RVC) on page 2-36
for more information.
Automatic Dimming Mirror
Operation
Automatic dimming reduces the
glare from the headlamps of
the vehicle behind you. The dimming
feature comes on and the indicator
light illuminates each time the
ignition is turned to start.
Temperature Display
To adjust between Fahrenheit and
Celsius:
Presszfor approximately
four seconds to toggle the display
from F (Fahrenheit) to C (Celsius)
to OFF. Release the button after
the display has toggled to the
next state.
The temperature display will
remain in its current state each
time the ignition goes through
its cycle.
At start up, if the vehicle has been
off for less than two and a half
hours, and the last stored
temperature was less than the
current temperature, the sensor
will increase 1°F every
two minutes until the correct
temperature is displayed.
If the vehicle has been off more
than two and a half hours, or the
last stored temperature is greater
than the current temperature, the
current temperature immediately
displays.
If the temperature is 37°F (3°C) or
lower, ICE will ash on the
temperature display. This display
will ash every two seconds for a
period of one minute.
If an abnormal temperature reading
is displayed for an extended
period of time, see your
dealer/retailer. Under certain
circumstances, a delay in updating
the temperature is normal.
Features and Controls 2-33

Headlamps on Reminder
A headlamp reminder chime will
sound if the following conditions
are met:
The driver door is open.
Parking lamps or headlamps are
manually turned on.
The key is either not in the
ignition switch, or it is in the
LOCK/OFF position of the ignition
switch.
The headlamp reminder cannot be
turned off if the conditions listed
above are met.
In the automatic mode, the
headlamps turn off once the ignition
is in ACC/ACCESSORY.
Daytime Running
Lamps (DRL)
Daytime Running Lamps (DRL) can
make it easier for others to see
the front of your vehicle during the
day. Fully functional daytime
running lamps are required on all
vehicles rst sold in Canada.
The DRL system will come on when
the following conditions are met:
The ignition is on.
The exterior lamps control is
in AUTO.
The transmission is not in
P (Park), if the vehicle has
an automatic transmission.
The light sensor determines it is
daytime.When the DRL are on, no other
lamps are on. The instrument panel
will not be lit up either. For
vehicles rst sold in Canada, if
parking lamps are manually turned
on, DRL will stay on.
When it begins to get dark, the
automatic headlamp system will
switch from DRL to the headlamps.
The regular headlamp system
should be turned on when needed.
To turn off the DRL, seeExterior
Lamps on page 3-11.
Vehicles rst sold in Canada cannot
turn off DRL unless certain
conditions are met. SeeExterior
Lamps on page 3-11.
Instrument Panel 3-13

Automatic Headlamp
System
When it is dark enough outside,
the automatic headlamp system
will turn on after the transmission
has been shifted from P (Park) to
D (Drive). The headlamps, taillamps,
sidemarker, parking lamps, roof
marker lamps, and the instrument
panel lights turn on at normal
brightness. The radio lights will
become dimmer when the
headlights are off compared to
when the headlights are on.
The vehicle has a light sensor
located on the top of the instrument
panel. Do not cover the sensor,
or the system will be on whenever
the ignition is on.
The system can turn on the
headlamps when driving in a parking
garage, through a tunnel or when
there is overcast weather. This
is normal.There is a delay in the transition
between the daytime and nighttime
operation of the Daytime Running
Lamps (DRL) and the automatic
headlamp system so that driving
under bridges or bright overhead
street lights does not affect the
system. The DRL and automatic
headlamp system will only be
affected when the light sensor
detects a change in lighting lasting
longer than the delay.
If the vehicle is started in a dark
garage, the automatic headlamp
system will come on immediately.
Once the vehicle leaves the garage,
it will take about one minute for
the automatic headlamp system to
change to DRL if it is light
outside. During that delay, the
instrument panel cluster may not be
as bright as usual. Make sure the
instrument panel brightness
control is in the full bright position.
SeeInstrument Panel Brightness on
page 3-15.
Off-Road Lamps
The off-road lamps, if the vehicle
has them, provide auxiliary lighting
when the vehicle is used off
road. These lamps are not intended
to be used in place of existing
vehicle lighting. The lamps are not
to be used on any public street
or highway and are to be covered
when not in use. Check your
state and local laws before installing
or using any auxiliary lighting. In
some states it may be necessary to
remove the roof lamps when
operating the vehicle on the
highway.
3-14 Instrument Panel

Passenger Safety Belt
Reminder Light
Several seconds after the engine is
started, a chime sounds for several
seconds to remind the front
passenger to buckle their safety belt.
This only occurs if the passenger
airbag is enabled. SeePassenger
Sensing System on page 1-54for
more information. The passenger
safety belt light, located on the
instrument panel, comes on and
stays on for several seconds and
then ashes for several more.
This chime and light are repeated if
the passenger remains unbuckled
and the vehicle is in motion.If the passenger safety belt is
buckled before the engine is started,
neither the chime nor the light
comes on.
The front passenger safety belt
warning light and chime may turn on
if an object is put on the seat
such as a briefcase, handbag,
grocery bag, laptop or other
electronic device. To turn off the
warning light and or chime, remove
the object from the seat or buckle
the safety belt
Airbag Readiness Light
There is an airbag readiness light on
the instrument panel cluster,
which shows the airbag symbol. The
system checks the airbag’s
electrical system for malfunctions.
The light indicates if there is an
electrical problem. The system
check includes the airbag sensor,the pretensioners, the airbag
modules, the wiring and the crash
sensing and diagnostic module.
For more information on the airbag
system, seeAirbag System on
page 1-46.
This light comes on when the
vehicle is started, and ashes for a
few seconds. The light goes out
when the system is ready.
Instrument Panel 3-25

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

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.At the same time, a Driver
Information Center (DIC) message
is displayed on the DIC display
screen. The low tire pressure
warning light and the DIC warning
message come on at each
ignition cycle until the tires are
inated to the correct ination
pressure. For additional information
and details about the DIC operation
and displays seeDIC Operation and
Displays on page 3-34andDIC
Warnings and Messages on
page 3-37.
The low tire pressure warning light
may come on in cool weather
when the vehicle is rst started, and
then turn off as you start to drive.
This could be an early indicator that
the air pressure in the tire(s) are
getting low and need to be inated
to the proper pressure.A Tire and Loading Information
label, attached to the vehicle, shows
the size of the vehicle’s original
equipment tires and the correct
ination pressure for the vehicle’s
tires when they are cold. See
Loading the Vehicle on page 4-35,
for an example of the Tire and
Loading Information label and its
location on the vehicle. Also see
Inflation - Tire Pressure on
page 5-51.
The vehicle’s TPMS can warn you
about a low tire pressure condition
but it does not replace normal
tire maintenance. SeeTire
Inspection and Rotation on
page 5-57andTires on page 5-44.
Notice:Liquid tire sealants
could damage the Tire Pressure
Monitor System (TPMS) sensors.
Sensor damage caused by using
a tire sealant is not covered
by your warranty. Do not use
liquid tire sealants.
5-54 Service and Appearance Care

TPMS Malfunction Light
and Message
The TPMS will not function properly
if one or more of the TPMS
sensors are missing or inoperable.
When the system detects a
malfunction, the low tire warning
light ashes for about one minute
and then stays on for the remainder
of the ignition cycle. A DIC warning
message is also displayed. The low
tire warning light and DIC warning
message come on at each ignition
cycle until the problem is corrected.
Some of the conditions that can
cause the malfunction light and
DIC message to come on are:
One of the road tires has been
replaced with the spare tire.
The spare tire does not have a
TPMS sensor. The TPMS
malfunction light and DIC
message should go off once you
re-install the road tire containing
the TPMS sensor.
The TPMS sensor matching
process was started but not
completed or not completed
successfully after rotating the
vehicle’s tires. The DIC message
and TPMS malfunction light
should go off once the TPMS
sensor matching process is
performed successfully.
See “TPMS Sensor Matching
Process” later in this section.
One or more TPMS sensors are
missing or damaged. The DIC
message and the TPMS
malfunction light should go off
when the TPMS sensors are
installed and the sensor
matching process is performed
successfully. See your
dealer/retailer for service.
Replacement tires or wheels do
not match the vehicle’s original
equipment tires or wheels. Tires
and wheels other than those
recommended for the vehicle
could prevent the TPMS from
functioning properly. SeeBuying
New Tires on page 5-59.
Operating electronic devices or
being near facilities using radio
wave frequencies similar to the
TPMS could cause the TPMS
sensors to malfunction.
If the TPMS is not functioning it
cannot detect or signal a low
tire condition. See your
dealer/retailer for service if the
TPMS malfunction light and
DIC message comes on and
stays on.
Service and Appearance Care 5-55