I was lucky, I had mine done by Vauxhall free of charge. Car is four years old, but with full service history, one non vauxhall and 57k on the clock.
Took it in, they said yep defo chain issue, we will renew it all for you no cost. I have been told on the grapevine that they will do this for cars with under 60k and Vuaxhall history up to June 2006.
Worth trying to negoiate with your dealer, as it is a Vauxhall problem and I think they should have recalled all affected cars, but that would have cost them too much I suspect.
Jim.
