2005 Buick Rainier Owner's Manual - Page 58

Your vehicle may or may not have a roof-mounted airbag. See Airbag System on page 1-46. These "rollover capable" airbags are designed 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 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 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 Operating Your All-Wheel-Drive Vehicle Off Paved Roads on page 4-15 for tips on off-road driving. 1-52