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Posts Tagged: Passkey III

PassKey III system

Fix PassKey III system Car won’t start security light on If you own a GM vehicle with PassKey iii system or a previous PassKey II or PassLock system and have a car won’t start security light on, this article is for you.   GM’s history of antitheft systems VATS and PassKey I GM’s first attempt at vehicle antitheft was called the Vehicle Antitheft System (VATS). It’s really the first PassKey system. Each key has a resistor pellet embedded in the key. When you insert the key, electrical contacts mounted on … Read More

GM PassKey and PassLock overview

Diagnose problems with anti-theft systems in GM vehicles Read More

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