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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1407 (Theft Deterrent System - Immobilizer) >> Description and Operation >> Vehicle Theft Deterrent (VTD) Description and Operation >> SECURITY Indicator Operation >> SECURITY Indicator Flashes and Engine Does Not Start

SECURITY Indicator Flashes and Engine Does Not Start

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The theft deterrent control module has measured an incorrect transponder value, the calculation to the challenge is incorrect or the PCM has lost communication with the theft deterrent control module, The VTD system considers this `a tamper condition. The VTD indicator will flash.

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