2009 Chevrolet Silverado 2500 HD Extended Cab Owner's Manual - Page 84
2009 Chevrolet Silverado 2500 HD Extended Cab Manual
Page 84 highlights
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. In addition, the vehicle may have dual-stage frontal airbags. Dual-stage airbags adjust the restraint according to crash severity. The vehicle has electronic frontal sensors, which help the sensing system distinguish between a moderate frontal impact and a more severe frontal impact. For moderate frontal impacts, dual-stage airbags inflate at a level less than full deployment. For more severe frontal impacts, full deployment occurs. Vehicles with dual stage airbags also have seat position sensors which enable the sensing system to monitor the position of the driver seat (all models) and the right front passenger seat (light-duty regular cab and light-duty extended cab models only). The seat position sensor provides information that is used to determine if the airbags should deploy at a reduced level or at full deployment. The vehicle may or may not have roof-rail airbags. See Airbag System on page 1-73. Roof-rail airbags are intended to inflate in moderate to severe side crashes. In addition, these roof-rail airbags are intended to inflate during a rollover or in a severe frontal impact. Roof-rail airbags will inflate if the crash severity is above the system's designed threshold level. The threshold level can vary with specific vehicle design. • 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. Thresholds can also vary with specific vehicle design. Frontal airbags are not intended to inflate during vehicle rollovers, rear impacts, or in many side impacts. If the GVWR (Gross Vehicle Weight Rating) of your vehicle is 8,500 lb (3 855 kg) or above, your vehicle has single stage airbags. If the GVWR is below 8,500 lb (3 855 kg) then your vehicle has dual stage airbags. You can find the GVWR on the certification label on the rear edge of the driver's door. See Loading the Vehicle on page 4-32 for more information. 1-78