Theft System Indicator
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2001 GMC Savana Special, 2001 GMC Savana Camper Special, 2001 GMC Savana, 2001 Chevrolet RV Cutaway, and 2001 Chevrolet Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
IPC illuminates SECURITY indicator when IPC detects that Vehicle Theft Deterrent (VTD) system has requested illumination (switched low). VTD system requests IPC to illuminate indicator only when ignition switch is in RUN position. VTD system uses the indicator as a malfunction indicator.