Security Indicator Always On or Flashing

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2002 GMC Yukon XL, 2002 GMC Yukon, 2002 Chevrolet Tahoe, 2002 Chevrolet Suburban, and 2002 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

Step	Action	Yes	No
Schematic Reference: Theft Deterrent System Schematics Connector End View Reference: Theft Deterrent System Connector End Views
1	Did you perform the Theft Deterrent Diagnostic System Check?	Go to Step 2	Go to Diagnostic System Check - Theft Deterrent
2	Turn ON the ignition with the engine OFF. With the scan tool, command the Security indicator ON and OFF. Does the Security indicator turn ON and OFF with each command?	Go to TESTING FOR INTERMITTENT AND POOR CONNECTIONS	Go to Step 3
3	Replace the Instrument Cluster. Refer to INSTRUMENT PANEL CLUSTER (IPC) REPLACEMENT . Did you complete the replacement?	Go to DIAGNOSTIC SYSTEM CHECK - INSTRUMENT CLUSTER	-