2007 GMC SIERRA Owner's Manual

When Should an Airbag Inate?
The driver’s and right front passenger’s frontal
airbags are designed to inate in moderate to
severe frontal or near-frontal crashes. But they are
designed to inate only if the impact exceeds a
predetermined deployment threshold. Deployment
thresholds take into account a variety of desired
deployment and non-deployment events and are
used to predict how severe a crash is likely to be in
time for the airbags to inate and help restrain the
occupants. Whether your frontal airbags will or
should deploy is not based on how fast your vehicle
is traveling. It depends largely on what you hit, the
direction of the impact, and how quickly your
vehicle slows down.
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.
Frontal airbags (driver and right front passenger)
are not intended to inate during vehicle
rollovers, rear impacts, or in many side impacts.
Your vehicle has a seat position sensor which
enables the sensing system to monitor the
fore and aft position of the driver’s seat. Seat
position sensors provide information that is used
to determine if the airbags should deploy at a
reduced level or at full deployment.
Your vehicle may or may not have roof-mounted
rollover airbags and a rollover sensor. See
Airbag System on page 83. These “rollover
capable” airbags are intended to inate in
moderate to severe side crashes, during a rollover,
or in a severe frontal impact. A roof-mounted
rollover airbag will inate if the crash severity is
above the system’s designed “threshold level.”
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The threshold level can vary with specic vehicle
design. Roof-mounted airbags are not intended
to inate in rear impacts. Both roof-mounted
rollover airbags will deploy when either side of the
vehicle is struck, during a rollover, 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 roof-mounted rollover airbags,
ination is determined by the location and severity
of the impact or a rollover event.
The airbag system is designed to work properly
under a wide range of conditions, including off-road
usage. Observe safe driving speeds, especially
on rough terrain. As always, wear your safety belt.
SeeOff-Road Driving on page 390for tips on
off-road driving.
If the GVWR (Gross Vehicle Weight Rating) of
your vehicle is 8,500 lb (3 855 kg) or above, your
vehicle has single stage airbags. If the GVWR
is below 8,500 lb (3 855 kg), your vehicle has dual
stage airbags. You can nd the GVWR on thecertication label on the rear edge of the driver’s
door. SeeLoading Your Vehicle on page 425
for more information.
Single Stage Airbags
If your vehicle has frontal airbags with single stage
deployment and your vehicle goes straight into
a wall that does not move or deform, the threshold
level is about 12 to 16 mph (19 to 26 km/h). The
threshold level can vary, however, with specic
vehicle design, so that it can be somewhat above
or below this range.
Dual Stage Airbags
If your vehicle has frontal airbags with dual stage
deployment, the amount of restraint will adjust
according to crash severity. Your vehicle has
electronic frontal sensors which help the sensing
system distinguish between a moderate and a
more severe frontal impact. For moderate frontal
impacts, these airbags inate at a level less
than full deployment. For more severe frontal
impacts, full deployment occurs. If the front of your
vehicle goes straight into a wall that does not
move or deform, the threshold level for the
reduced deployment is about 9 to 16 mph
(14 to 26 km/h), and the threshold level for a full
deployment is about 18 to 23 mph (29 to 37 km/h).
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The threshold level can vary, however, with
specic vehicle design, so that it can be somewhat
above or below this range. Vehicle’s with dual
stage airbags also have a sensor which enables
the sensing system to monitor the position of
the driver seat. The seat position sensor provides
information which is used to determine if the
airbags should deploy at a reduced level or at full
deployment.
What Makes an Airbag Inate?
In an impact of sufficient severity, the airbag
sensing system detects that the vehicle is
in a crash. In the case of a roof-mounted rollover
airbag, the sensing system detects that the
vehicle is about to roll over or has been in a severe
frontal impact or a moderate to severe side
impact. The sensing system triggers a release of
gas from the inator, which inates the airbag.
The inator, airbag, and related hardware are all
part of the airbag modules inside the steering
wheel and in the instrument panel in front of the
right front passenger. For vehicles with
roof-mounted rollover airbags, the airbag modules
are located in the ceiling of the vehicle, near
the side windows.
How Does an Airbag Restrain?
In moderate to severe frontal or near frontal
collisions, even belted occupants can contact the
steering wheel or the instrument panel. In
moderate to severe side collisions, even belted
occupants can contact the inside of the vehicle.
Airbags supplement the protection provided
by safety belts. Airbags distribute the force of the
impact more evenly over the occupant’s upper
body, stopping the occupant more gradually. But
the frontal airbags would not help you in many
types of collisions, including rollovers, rear
impacts, and many side impacts, primarily because
an occupant’s motion is not toward the airbag.
Roof-mounted rollover airbags would not help you
in many types of collisions, including many
frontal or near frontal collisions, and rear impacts.
Airbags should never be regarded as anything
more than a supplement to safety belts, and then
only in moderate to severe frontal or near-frontal
collisions for the driver’s and right front
passenger’s frontal airbags, and only in moderate
to severe side collisions or rollovers for vehicles
with roof-mounted rollover airbags.
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What Will You See After an Airbag
Inates?
After a frontal airbag inates, it quickly deates, so
quickly that some people may not even realize
an airbag inated. Roof-mounted rollover airbags
may still be at least partially inated minutes
after the vehicle comes to rest. Some components
of the airbag module — the steering wheel hub
for the driver’s airbag, the instrument panel for the
right front passenger’s airbag, and the area
along the ceiling of the vehicle near the side
windows for vehicles with roof–mounted side
impact airbags — may be hot for a short time. The
parts of the airbag that come into contact with
you may be warm, but not too hot to touch. There
may be some smoke and dust coming from the
vents in the deated airbags. Airbag ination does
not prevent the driver from seeing out of the
windshield or being able to steer the vehicle, nor
does it prevent people from leaving the vehicle.
{CAUTION:
When an airbag inates, there may be
dust in the air. This dust could cause
breathing problems for people with a
history of asthma or other breathing
trouble. To avoid this, everyone in the
vehicle should get out as soon as it is
safe to do so. If you have breathing
problems but cannot get out of the vehicle
after an airbag inates, then get fresh air
by opening a window or a door. If you
experience breathing problems following
an airbag deployment, you should seek
medical attention.
Your vehicle has a feature that may automatically
unlock the doors, turn the interior lamps on,
and ash the hazard warning ashers when the
airbags inate. You can lock the doors again, turn
the interior lamps off, and turn off the hazard
warning ashers by using the controls for those
features.
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In many crashes severe enough to inate the
airbag, windshields are broken by vehicle
deformation. Additional windshield breakage may
also occur from the right front passenger
airbag.
Airbags are designed to inate only once.
After an airbag inates, you will need
some new parts for your airbag system. If you
do not get them, the airbag system will not
be there to help protect you in another crash.
A new system will include airbag modules
and possibly other parts. The service manual
for your vehicle covers the need to replace
other parts.
Your vehicle has a crash sensing and
diagnostic module which records information
after a crash. SeeVehicle Data Collection and
Event Data Recorders on page 656.
Let only qualied technicians work on the
airbag system. Improper service can mean that
an airbag system will not work properly. See
your dealer for service.
Airbag Off Switch
If one of the switches pictured in the following
illustrations is located in your glove box, your
vehicle has an airbag on-off switch that you can
use to manually turn on or off the right front
passenger’s airbag. Your switch may vary slightly.
If your vehicle does not have an airbag off switch,
it may have a passenger sensing system. See
Passenger Sensing System.
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This switch should only be turned to the off
position if the person in the right front passenger’s
position is a member of a passenger risk group
identied by the national government as follows:
Infant.An infant (less than 1 year old)
must ride in the front seat because:

My vehicle has no rear seat;
My vehicle has a rear seat too small to
accommodate a rear-facing infant seat; or
The infant has a medical condition which,
according to the infant’s physician, makes
it necessary for the infant to ride in the front
seat so that the driver can constantly
monitor the child’s condition.
Child age 1 to 12.A child age 1 to 12 must
ride in the front seat because:

My vehicle has no rear seat;
Although children ages 1 to 12 ride in the rear
seat(s) whenever possible, children
ages 1 to 12 sometimes must ride in the front
because no space is available in the rear
seat(s) of my vehicle; or
The child has a medical condition which,
according to the child’s physician, makes
it necessary for the child to ride in the front
seat so that the driver can constantly monitor
the child’s condition.
Medical Condition.A passenger has a
medical condition which, according to his or
her physician:

Causes the passenger airbag to pose a
special risk for the passenger; and
Makes the potential harm from the passenger
airbag in a crash greater than the potential
harm from turning off the airbag and allowing
the passenger, even if belted, to hit the
dashboard or windshield in a crash.
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{CAUTION:
If the right front passenger’s airbag is
turned off for a person who is not in a risk
group identied by the national
government, that person will not have the
extra protection of an airbag. In a crash,
the airbag will not be able to inate and
help protect the person sitting there. Do
not turn off the passenger’s airbag unless
the person sitting there is in a risk group.
To turn off the right front passenger’s airbag,
insert your ignition key into the switch, push in, and
move the switch to the off position.
The word OFF or the off symbol will come on in
the passenger airbag status indicator located in the
overhead console to let you know that the right
front passenger’s airbag is off, after the system
check is completed. The airbag off light will come
on and stay on to let you know that the right
front passenger’s airbag is off. SeeAirbag Off Light
on page 250.
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{CAUTION:
If the airbag readiness light ever comes
on when you have turned off the airbag, it
means that something may be wrong with
the airbag system. The right front
passenger’s airbag could inate even
though the switch is off. If this ever
happens, do not let anyone whom the
national government has identied as a
member of a passenger airbag risk group
sit in the right front passenger’s position
(for example, do not secure a rear-facing
child restraint in the right front
passenger’s seat) until you have your
vehicle serviced. SeeAirbag Readiness
Light on page 250for additional
information.To turn the right front passenger’s airbag on
again, insert your ignition key into the switch, push
in, and move the switch to the on position.
The right front passenger’s frontal airbag is now
enabled (may inate). SeeAirbag Off Light
on page 250for more information.
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