- General Motors Company 2005 Envoy Automobile Owner Manual

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 25 mph (29 to 40 km/h).
(The threshold level can vary, however, with specific
vehicle design, so that it can be somewhat above
or below this range.)
Airbags may inflate at different crash speeds.
For example:
• If the vehicle hits a stationary object, the airbag
could inflate at a different crash speed than if
the object were moving.
• If the object deforms, the airbag could inflate at a
different crash speed than if the object does not
deform.
• If the vehicle hits a narrow object (like a pole) the
airbag 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
airbag 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 because inflation
would not likely help the occupants.
Your vehicle may or may not have a roof-mounted
airbag and rollover sensor. See Airbag System
on page 1-52. These “rollover capable” airbags are
designed to inflate in moderate to severe side crashes
or during a rollover. A side impact airbag will inflate
if the crash severity is above the system’s designed
“threshold level.” The threshold level can vary with
specific vehicle design. Side impact airbags are not
designed to inflate in frontal or near-frontal impacts, or
rear impacts, because inflation would not likely help
the occupant.
Your vehicle has seat position sensors which enable the
sensing system to monitor the position of the driver’s
seat and the right front passenger’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.
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
the angle of the impact and how quickly the vehicle
slows down in frontal and near-frontal impacts. For side
impact airbags, inflation is determined by the location
and severity of the impact.
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