All right guys I need some ideas here. My truck has been doing this for a year. About once a month I jump in my truck and it won't start and the security lock symbol in the dash is the only thing that shows. I've taken it to multiple dealerships and they can't help because the scan tool shows no trouble codes. This is really frustrating because I don't dare shut my truck off cause I never know when it will not start. There's no rhyme or reason to when it does this. Hopefully someone has had this and can point me in the right direction.