Inflatable Restraint Wiring Harnesses
WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
The wiring harnesses connect the sensing and diagnostic module (SDM), inflator modules, passenger presence system (PPS), front end sensors, seat position sensors (SPS), passenger seat belt tension retractor sensor, and the class 2 serial data circuit together using weather pack connectors. SIR deployment loop connectors are yellow in color for easy identification. When repairing SIR system wiring harnesses, follow the proper testing and wiring repair procedures outlined in this manual.