2006 GMC Envoy Owner's Manual - Page 70

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). Your vehicle may or may not have a roof-mounted airbag and a rollover sensor. See Airbag System on page 1-58. 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 4-19 for tips on off-road driving. • 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. 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. 1-64