Envoy 2WD V8-5.3L VIN P (2004)
Security Lamp/Indicator: Description and Operation
Theft Deterrent
SECURITY INDICATOR
The SECURITY indicator on the instrument cluster is controlled by both the VTD system and the CTD system. The SECURITY indicator is an LED on
the instrument cluster which illuminates the word SECURITY. The SECURITY indicator is controlled by the body control module grounding the
security indicator control circuit.
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The VTD system commands the instrument cluster to control the indicator only when the ignition switch is ON. The VTD system uses the
indicator as a malfunction indicator.
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The CTD system commands the instrument cluster to control the indicator only when the ignition switch is OFF. The CTD system uses the
indicator to identify system status.
