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== Overview ==
The '''Vehicle Anti-Theft System''' or '''VATS''' is a term used by (General Motors)[https://wikipedia.org/wiki/General_Motors] to refer to immobilizer systems commonly built into GM vehicles. The VATS system is typically comprised of hardware within the vehicle key as well as software that exists within various modules. The modules commonly known to be required for VATS operation include the [[Holden:Power-train Control Module|Power-train Control Module]] (PCM) [[Holden:Body Control Module|Body Control Module]] (BCM) and optionally the [[Holden:Power-train Interface Module|Power-train Interface Module]] (PIM) present in specific V8 models.
=== On startup ===
The role of VATS is to verify by electronic means that the correct key has been inserted, ruling out the possibility that the mechanical locking mechanism has been circumvented.
The '''Vehicle Anti-Theft System''' or '''VATS''' is a term used by (General Motors)[https://wikipedia.org/wiki/General_Motors] to refer to immobilizer systems commonly built into GM vehicles. The VATS system is typically comprised of hardware within the vehicle key as well as software that exists within various modules. The modules commonly known to be required for VATS operation include the [[Holden:Power-train Control Module|Power-train Control Module]] (PCM) [[Holden:Body Control Module|Body Control Module]] (BCM) and optionally the [[Holden:Power-train Interface Module|Power-train Interface Module]] (PIM) present in specific V8 models.
=== On startup ===
The role of VATS is to verify by electronic means that the correct key has been inserted, ruling out the possibility that the mechanical locking mechanism has been circumvented.