try putting the key in the ignition and then push the buttons ( the ones that open doors ) on key for about 5 to 10 seconds, sometimes this works but not on all vauxhalls.
tynesidelad
January 2014
you will need your four digit security code and a suitable computer to do this
cdc
January 2014
I can answer this question...
how do you reprogram key for Vauxhall Astra Hatchback GTC SRI?