I was thinking about getting the Predator programmer.

My concern is if there is a way for the dealership to know if you re flashed your computer? Assuming that you reflash to the stock program everytime you bring it in to the dealership?

If I remember correctly it isn't easy to see evidence of the programmer. Do a search. This has been discussed here a few times before.

from what I've read, the dealreship will only see the last time the ECM was reset. You can tell them you had the codes read and cleared at Autozone to see if it would fix the problem.