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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1693 (Theft Deterrent System - Immobilizer) >> Description and Operation >> Theft Systems Description and Operation >> Security Indicator

Security Indicator

WARNING: This page is about a different car, the 2002 Oldsmobile Bravada, 2002 GMC Envoy XL, 2002 GMC Envoy, and 2002 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.

The instrument panel cluster (IPC) illuminates the SECURITY indicator as determined by the vehicle theft deterrent (VTD) system. The IPC receives a message via the serial data circuit from the theft deterrent control module requesting illumination. The VTD system requests the IPC to illuminate the indicator only when the ignition is ON. The VTD system uses the indicator as a malfunction indicator. For vehicle theft deterrent (VTD) information, refer to Vehicle Theft Deterrent (VTD) Description and Operation .

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