Description & Operation

WARNING: This page is about a different car, the 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Silverado, and 2003 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

WARNING: Accidental air bag deployment is possible. Personal injury may result. To avoid accidental air bag deployment or injury, read and carefully follow all WARNINGS and AIR BAG SAFETY PRECAUTIONS .

Supplemental Inflatable Restraint (SIR) system is designed to supplement protection provided by driver-side and passenger-side seat belts. A frontal collision of sufficient force will deploy driver-side and passenger-side air bag modules. Steering column and knee bolsters also absorb collision energy. SDM maintains a 23 Volt Loop Reserve (VLR) to deploy air bag modules for up to one minute after loss of battery voltage.

SIR system consists of Sensing and Diagnostic Module (SDM), driver-side and passenger-side single stage or dual stage air bag modules, passenger-side air bag module disable switch, front end discriminating sensor, also known as Electronic Frontal Sensor (EFS), driver and passenger front Seat Position Sensors (SPS), Passenger Presence System (PPS), SIR coil assembly and AIR BAG warning light.