Air Bag Warning Light
WARNING: This page is about a different car, the 2002 GMC Savana and 2002 Chevrolet Chevy Express. However, it is still accessible from the selected car via links, so may be relevant.
Ignition switch applies battery voltage to AIR BAG warning light. AIR BAG warning light is controlled by Sensing and Diagnostic Module (SDM). When ignition is turned on, AIR BAG warning light flashes 7 times while SDM checks SIR system for malfunctions. AIR BAG warning light will turn off if no malfunctions are detected. During vehicle operation, AIR BAG warning light warns driver of malfunctions which could potentially affect SIR system operation.