Front or rear ?
Rear, remove whole bulb mounting plate from behind the taillight, under a plastic cover in the boot, and replace bulb.
Front - remove bulb holder from under the bonnet behind the battery on the passengers side, lift the relay box out of the way, fit small hand to arm, and rotate the holder anticlockwise to remove the holder.
BTW _ the bulbs are coloured, and have offset pins. Why the offset pins - just buy the right ones, stop asking why, because you will start to ask why I bought a vectra.
trover, May 2009
