How Does An Airbag Restrain; What Makes An Airbag Inflate - GMC TopKick 2007 Owner's Manual

What Makes an Airbag Inflate?
In an impact of sufficient severity, the airbag
sensing system detects that the vehicle is in a
crash. The sensing system triggers a release of
gas from the inflator, which inflates the airbag. The
inflator, 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.

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. The airbag
supplements 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 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 those airbags.
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.
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What Will You See After an Airbag
Inflates?
After an airbag inflates, it quickly deflates, so
quickly that some people may not even realize the
airbag inflated. Some components of the airbag
module — the steering wheel hub for the driver's
airbag or the instrument panel for the right
front passenger's bag — 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 deflated airbags. Airbag inflation
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.