I have tuned this truck many times with different tunes, after it sat for a while, while I was building the engine more, I tried to tune to a hotter tune, and a few other tunes and it says locked with key. I have never had this issue and the tune that is in the truck currently is definitely not locked with a custom key. I was able to re tune the trans but not the ecm. I also have a security light now that I can not figure out or find. I do have the trace file, but can not upload it via my phone apparently. This is my first post, so go easy on me