Can you communicate with the CIM unit, if so then do a vehicle ecu search with the Tech II and see which units you have no coms with, check the CAN lines, you should have 60 Ohm's across the two lines, If the ECM or ABS has a fault on the CAN lines there will be no Com's with any of the ecu's connected after the fault, The CIM is the main hub of the system on the Vectra C and it has three pairs of CAN lines, HIGH, MID, and LOW, most of the systems you have listed seem to be on the HIGH Speed CAN, so check the connectors at the ABS and ECM first, these have the highest priority of all the controllers on this line, give me a list of the controllers with no coms, and i will see if i can help you further,