Indicator Lights: Security
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 1999 Oldsmobile Bravada, 1999 GMC Sonoma, 1999 GMC Jimmy, 1999 GMC Envoy, and 1999 Chevrolet S10 Pickup. However, it is still accessible from the selected car via links, so may be relevant.
Light Emitting Diode (LED) is controlled by Instrument Panel Cluster (IPC), using Class 2 data from Body Control Module (BCM). As a check, LED illuminates briefly when key is turned to run, until engine starts. If LED flashes, system has entered a tamper mode. If LED stays on while driving, system malfunction exists and vehicle will not be protected by security system. A system related DTC may be stored.