theft deterrent system
 

2003 vette, I was sitting in car and alarm went off my mistake. So I put key in ignition and it shut off alarm, now car will not come out of
theft mode I tried both keys after waiting 3 minutes, I tried key in door lock and unlock 3 times waited again nothing, disconected battery for 20 minutes nothing so I put vette on trailer and brought home.
Any help please.

changed the battery in the remote? is the auto lock activated on one of the remotes? Are the keys in decent condition, so that the security contact touches the ignition properly?