Air Bag Indicator

WARNING: This page is about a different car, the 2002 Chevrolet Monte Carlo, 2002 Chevrolet Impala, 2001 Chevrolet Monte Carlo, and 2001 Chevrolet Impala. However, it is still accessible from the selected car via links, so may be relevant.

Instrument Panel Cluster (IPC) illuminates air bag indicator when following occurs:

If inflatable restraint Sensing and Diagnostic Module (SDM) detects a malfunction with supplemental inflatable restraint system, IPC receives a class 2 message from SDM requesting illumination.
When IPC performs displays test at start of each ignition cycle, IPC flashes air bag indicator 7 times.
IPC detects a loss of class 2 communications with SDM.