Sentry Key Immobilizer System
The Sentry Key Immobilizer System (SKIS) is designed to provide passive protection against unauthorized vehicle use by preventing the engine from operating. The components of this system are the Sentry Key Immobilizer Module (SKIM) (Fig 1 ), Body Control Module (BCM), Sentry Key transponder, VTSS indicator LED, and the Powertrain Control Module (PCM).
The SKIM is installed on the steering column near the ignition lock cylinder. The transponder is located under the molded rubber cap on the head of the ignition key. The VTSS indicator LED is located in the instrument panel top cover.