Air Bag Modules
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2002 GMC Sierra, 2002 GMC Cab & Chassis Sierra, 2002 GMC C3500 HD, 2002 Chevrolet Silverado, and 2002 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
Air bag modules consist of an inflatable bag and an inflator. When vehicle is in an accident of sufficient force, Sensing and Diagnostic Module (SDM) causes current to flow through air bag module deployment loops. Current passing through inflators ignites inflator charges, producing gas which rapidly inflates air bags.