Vauxhall UK (=Opel) Vectra C - spark module & CanBus

I have a late 2005 `facelift' 2.2 direct injection Z22 YH engine - petrol. (OK - gasoline to our USA friends)
Does anyone know if the ignition HT module can be lifted off the
spark plugs and disconnected without having to re-program the CanBus ?
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