Security Indicator Always On or Flashing

WARNING: This page is about a different car, the 2007 Hummer H2. 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
1	Did you perform the Diagnostic System Check - Vehicle?	Go to Step 2	Go to Diagnostic System Check - Vehicle
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 Conditions and Poor Connections	Go to Step 3
3	Replace the body control module (BCM). Refer to Control Module References for replacement, setup, and programming. Did you complete the replacement?	Go to Diagnostic System Check - Vehicle	-