You have to get a new chip and get it programmed.
A used chip can't be re-programmed.
New chips are not expensive, but the programming can be, especially if you don't have the 'car pass' card with your immobiliser code on it.
Doesn't have to be done at Vauxhall, lots of places can do it.
spence
October 2010
you could but it wouldnt start
me
October 2010
I can answer this question...
my chip fell out of my vauxhall astra mark4 key fob?