How do you change the side indicator on a 2002 Vectra new shape?

Think these are the same as on the astra.You need to be a bit gentle to avoid breaking the clips.Push the whole lamp(try towards the rear first)until the small "barb"clip clears the slot and allows the lamp to swing out at one end.Then the lamp will come free.Just pull out the bulbholder and replace the bulb.Its a 501 capless type.Then simply clip the lamp back in,large clip first.