I have the key to lock in the door jam, so I can manually immobilise the car.
Did the factory remote just lock the doors, or deadlock them?
And then is there a way to get an aftermarket remote to work it?
I spoke to Holden who can sell me a remote, and then they can somehow find out the code that was originally with the car when it left the factory. But they said if it's been reprogrammed at some point for a different remote or something, then they can't change it again.
How likely would this be? At some point, the ignition has been changed so it has a different key.