Ive got and Astra Mk 4 2.2 SRI and have recently been having problems with the alarm.
Over the last couple of weeks, whenever I lock the car the alarm goes off (without fail)!!!!!!!!!!!!
The majority of the time the alarm will go off within a minute or so of me locking the car, however, there has been occasions where it hasnt gone off for about an hour or so after locking it.
Has anyone had a similar problem?
Any advice appreciated