2003 CHEVROLET EXPRESS CARGO VAN Owners Manual

When Should an Air Bag In¯ate?
An air bag is designed to in¯ate in a moderate to severe
frontal, or near-frontal crash. The air bag will in¯ate
only if the impact speed is above the system's designed
ªthreshold level.º
If the GVWR (Gross Vehicle Weight Rating) of your
vehicle is 8600 or above, your vehicle has single stage
air bags. If the GVWR is below 8600 then your
vehicle has dual stage air bags. You can ®nd the GVWR
on the certi®cation label on the rear edge of the
driver's door. See
Loading Your Vehicle on page 4-29for more information.
Single Stage Air Bags
If your vehicle has frontal air bags with single stage
deployment and your vehicle goes straight into a wall
that doesn't move or deform, the threshold level is about
9 to 16 mph (14 to 26 km/h). The threshold level can
vary, however, with speci®c vehicle design, so that it can
be somewhat above or below this range. If your
vehicle strikes something that will move or deform, such
as a parked car, the threshold level will be higher.
The air bag is not designed to in¯ate in rollovers, rear
impacts, or in many side impacts because in¯ation
would not help the occupant.In any particular crash, no one can say whether an air
bag should have in¯ated simply because of the damage
to a vehicle or because of what the repair costs were.
In¯ation is determined by the angle of the impact
and how quickly the vehicle slows down in frontal or
near-frontal impacts.
Dual Stage Air Bags
If your vehicle has frontal air bags with dual stage
deployment, the amount of restraint will adjust according
to the crash severity. For moderate frontal impacts,
these air bags in¯ate 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 doesn't move or deform, the threshold level for
the reduced deployment is about 12 to 16 mph
(19 to 26 km/h), and the threshold level for a full
deployment is about 16 to 25 mph (26 to 40 km/h). The
threshold level can vary, however, with speci®c
vehicle design, so that it can be somewhat above or
below this range.
If your vehicle strikes something that will move or
deform, such as a parked car, the threshold level will be
higher. The driver's and right front passenger's frontal
air bags are not designed to in¯ate in rollovers, rear
impacts, or many side impacts because in¯ation would
not help the occupant.
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Seat Position Sensors
Vehicles with dual stage air bags are also equipped with
special sensors which enable the sensing system to
monitor the position of both the driver and passenger
front seats. The seat position sensors provide
information which is used to determine if the air bags
should deploy at a reduced level or at full depoyment.
Air Bag Systems
In any particular crash, no one can say whether an air
bag should have in¯ated simply because of the damage
to a vehicle or because of what the repair costs were.
In¯ation is determined by the angle of the impact
and how quickly the vehicle slows down in front or
near-frontal impacts.
What Makes an Air Bag In¯ate?
In an impact of sufficient severity, the air bag sensing
system detects that the vehicle is in a crash. The
sensing system triggers a release of gas from the
in¯ator, which in¯ates the air bag. The in¯ator, air bag,
and related hardware are all part of the air bag
modules inside the steering wheel and in the instrument
panel in front of the right front passenger.
How Does an Air Bag Restrain?
In moderate to severe frontal or near-frontal collisions,
even belted occupants can contact the steering wheel or
the instrument panel. Air bags supplement the
protection provided by safety belts. Air bags distribute
the force of the impact more evenly over the occupant's
upper body, stopping the occupant more gradually.
But air bags 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 those air bags. Air bags 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.
What Will You See After an Air Bag
In¯ates?
After an air bag in¯ates, it quickly de¯ates, so quickly
that some people may not even realize the air bag
in¯ated. Some components of the air bag module ± the
steering wheel hub for the driver's air bag, or the
instrument panel for the right front passenger's
bag ± will be hot for a short time. The parts of the bag
that come into contact with you may be warm, but
not too hot to touch. There will be some smoke and dust
coming from the vents in the de¯ated air bags.
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Air bag in¯ation doesn't prevent the driver from seeing
or being able to steer the vehicle, nor does it stop
people from leaving the vehicle.
{CAUTION:
When an air bag in¯ates, there is 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
can't get out of the vehicle after an air bag
in¯ates, then get fresh air by opening a
window or a door. If you experience breathing
problems following an air bag deployment, you
should seek medical attention.
·Air bags are designed to in¯ate only once. After
they in¯ate, you'll need some new parts for your
air bag system. If you don't get them, the air
bag system won't be there to help protect you in
another crash. A new system will include air
bag modules and possibly other parts. The service
manual for your vehicle covers the need to
replace other parts.
·Your vehicle is equipped with a crash sensing and
diagnostic module, which records information
about the air bag system. The module records
information about the readiness of the system, when
the system commands air bag in¯ation and
driver's safety belt usage at deployment. The
module also records speed, engine rpm, brake and
throttle data.
·Let only quali®ed technicians work on your air bag
system. Improper service can mean that your air
bag system won't work properly. See your dealer for
service.
Notice:If you damage the covering for the driver's
or the right front passenger's air bag, the bag
may not work properly. You may have to replace the
air bag module in the steering wheel or both the
air bag module and the instrument panel for
the right front passenger's air bag. Do not open or
break the air bag coverings.
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Air Bag Off Switch
If the GVWR (Gross Vehicle Weight Rating) of your
vehicle is 8600 or above, your vehicle has an air bag off
switch. You can ®nd the GVWR on the certi®cation/tire
label on the rear edge of the driver's door. See
Loading
Your Vehicle on page 4-29for more information.
You can use the air bag off switch on the instrument
panel to turn off the right front passenger's air bag.This switch should only be turned to AIR BAG OFF if
the person in the right front passenger's position is
a member of a passenger risk group identi®ed 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.
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Medical Condition.A passenger has a
medical condition which, according to his or
her physician:
·causes the passenger air bag to pose a special risk
for the passenger; and
·makes the potential harm from the passenger air
bag in a crash greater than the potential harm
from turning off the air bag and allowing the
passenger, even if belted, to hit the dashboard or
windshield in a crash.
{CAUTION:
If the right front passenger's air bag is turned
off for a person who isn't in a risk group
identi®ed by the national government, that
person won't have the extra protection of an
air bag. In a crash, the air bag wouldn't be able
to in¯ate and help protect the person sitting
there. Don't turn off the passenger's air bag
unless the person sitting there is in a risk
group. See ªAir Bag Off Switchº in the Index.To turn off the right front passenger's air bag, insert
your ignition key into the switch, push in, and move the
switch to AIR BAG OFF.
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The AIR BAG OFF light will come on to let you know
that the right front passenger's air bag is off. The
right front passenger's air bag will remain off until you
turn it back on again, and the AIR BAG OFF light
will stay on to remind you that the air bag is off.
{CAUTION:
If the air bag readiness light ever comes on
when you have turned off the air bag, it means
that something may be wrong with the air bag
system. The right front passenger's air bag
could in¯ate even though the switch is off.
If this ever happens, don't let anyone whom
the national government has identi®ed as a
member of a passenger air bag risk group
sit in the right front passenger's position
(for example, don't secure a rear-facing child
restraint in your vehicle) until you have your
vehicle serviced.To turn the right front passenger's air bag on again,
insert your ignition key into the switch, push in,
and move the switch to the on position.
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Servicing Your Air Bag-Equipped
Vehicle
Air bags affect how your vehicle should be serviced.
There are parts of the air bag system in several places
around your vehicle. You don't want the system to
in¯ate while someone is working on your vehicle. Your
dealer and the service manual have information
about servicing your vehicle and the air bag system. To
purchase a service manual, see
Service Publications
Ordering Information on page 7-9.
{CAUTION:
For up to 10 minutes after the ignition key is
turned off and the battery is disconnected, an
air bag can still in¯ate during improper
service. You can be injured if you are close to
an air bag when it in¯ates. Avoid wires
wrapped with yellow tape or yellow
connectors. They are probably part of the air
bag system. Be sure to follow proper service
procedures, and make sure the person
performing work for you is quali®ed to do so.
The air bag system does not need regular maintenance.
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Adding Equipment to Your Air
Bag-Equipped Vehicle
Q:If I add a push bumper or a bicycle rack to the
front of my vehicle, will it keep the air bags
from working properly?
A:As long as the push bumper or bicycle rack is
attached to your vehicle so that the vehicle's
basic structure isn't changed, it's not likely to keep
the air bags from working properly in a crash.
Q:Is there anything I might add to the front of the
vehicle that could keep the air bags from
working properly?
A:Yes. If you add things that change your vehicle's
frame, bumper system, front end sheet metal or
height, they may keep the air bag system
from working properly. Also, the air bag system
may not work properly if you relocate any of the air
bag sensors. If you have any questions about
this, you should contact Customer Assistance
before you modify your vehicle. The phone
numbers and addresses for Customer Assistance
are in Step Two of the
Customer Satisfaction
Procedure on page 7-2
.
Restraint System Check
Checking Your Restraint Systems
Now and then, make sure the safety belt reminder light
and all your belts, buckles, latch plates, retractors
and anchorages 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.
Torn or frayed safety belts may not protect you in a
crash. They can rip apart under impact forces. If a belt
is torn or frayed, get a new one right away.
Also look for any opened or broken air bag covers, and
have them repaired or replaced. (The air bag system
does not need regular maintenance.)
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