Vauhall vectra 2.2 petrol timing belt or timing chain?

I had a 2001 Vectra B 2.2 SRI 150 and that was chain driven rather than a belt, if you hear the engine rattle stop driving it immediately and tow it to a garage as they are renowned for snapping. Mine snapped and was going to cost more than the car was worth to replace so ended up in car heaven. Hope this helps.