Buick 2007 Terraza Owner's Manual page 82

In addition, your vehicle has "dual stage" frontal
airbags, which adjust the restraint according
to crash severity. For moderate frontal impacts,
these airbags inflate at a level less than full
deployment. Your vehicle has electronic frontal
sensors, which help the sensing system distinguish
between a moderate frontal impact and a more
severe frontal impact. 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 12 to 18 mph
(19 to 29 km/h), and the threshold level for
a full deployment is about 18 to 25 mph
(29 to 40.2 km/h). The threshold level can vary,
however, with specific vehicle design, so that it can
be somewhat above or below this range.
82
Frontal airbags may inflate at different crash
speeds. For example:
•
If the vehicle hits a stationary object, the
airbags could inflate at a different crash speed
than if the vehicle hits a moving object.
•
If the vehicle hits an object that deforms, the
airbags could inflate 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 inflate 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 inflate at a different crash
speed than if the vehicle goes straight into the
object.
The frontal airbags (driver and right front
passenger) are not intended to inflate during
vehicle rollovers, rear impacts, or in many side
impacts.