Vectra 1997 2.0 petrol with air con, as above you have to take the engine stabiliser off, 3 bolts on the engine and 3 bolts on the wing. Under the brake servo undo all brackets on the alternator, 12 bolts all together then the air box, air pipes and cables and the alternator comes out. Just take care not to pull the brake oil reservoir out of the master cylinder!
Gary
January 2008