Concerning my question about security light on 2006 Chevrolet Express 1500

Am I on the right track thinking that my passlock is faulty when no "security " light comes stated there has never been a "security light indicator on either of my express vans, yet an internet search of my cranks but does't start, all indicates a faulty passlock. I've come to this conclusion after doing all of the tests for no start issues.

Asked by for the 2006 Chevrolet Express 1500