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yeh my vy came with it (ex-cop car) apparently its a feature that holden have to unlock and was only unlocked for the cops from factory, but as far as i know holden can unlock it for you if you ask them nicely
before you turn the key on, hole mode and set on the buttons next to the steereing wheel, then turn on the key.It should take you into the diagonsitcs mode
its called tech2 and the holden dealer wanted 60bucks for it done.