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Circuit Description

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.

When ignition is turned on, Sensing and Diagnostic Module (SDM) commands Instrument Panel Cluster (IPC) to flash AIR BAG warning light 7 times while SDM checks SIR system for malfunctions. If SIR system is okay, AIR BAG warning light will then turn off.

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