First I want to say that this isnt my first powerstroke, but is my first 7.3. I had a bully dog triple dog GT for my 2003 chevy duracrap and I did some major power enhancements. I have the option to tune the 99-03 7.3s but when it gets done Installing the tunes it doesnt let my use them. I was wondering if anyone else had a 7.3 And were using the triple dog and having the same problem As I. If needed I can make a video of the problem. I have asked bully dog And haven't gotten an answer and don't expect one