Buick 2006 Rainier - Manual (Page 60)

Your vehicle may or may not have a roof-mounted airbag
and a rollover sensor. See Airbag System on page 1-48.
These “rollover capable” airbags are intended to inflate
in moderate to severe side crashes or during a rollover.
A roof-mounted airbag will inflate if the crash severity is
above the system’s designed “threshold level.” The
threshold level can vary with specific vehicle design.
Roof-mounted airbags are not intended to inflate in
frontal or near-frontal impacts, or rear impacts. Both
roof-mounted airbags will deploy when either side of
the vehicle is struck or during a rollover.
In any particular crash, no one can say whether an
airbag should have inflated simply because of the
damage to a vehicle or because of what the repair costs
were. For frontal airbags, inflation is determined by
what the vehicle hits, the angle of the impact, and how
quickly the vehicle slows down. For roof-mounted
airbags, inflation is determined by the location and
severity of the impact.
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. See Off-Road
Driving on page 4-18 for tips on off-road driving.
What Makes an Airbag Inflate?
In an impact of sufficient severity, the airbag sensing
system detects that the vehicle is in a crash. In the
case of a “rollover capable” roof-mounted side impact
airbag, the sensing system detects that the vehicle
is about to roll over. 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. For vehicles with roof-mounted side impact
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. 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 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.
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