I have a 2006 G6 GT that i had bought from a place. Right now it has a decent issue, when i brake the brake lights dim, when im not braking they are fully lit up. Whenever that issue with the brake lights occur the cruise control doesn't work either. The check engine is never on. BUT i do have a case or two where the cruise has worked and the brake lights were working properly, but while i was driving it started the issue again. I have taken in by a shop but they could not find what the problem was because it was not occurring when they had the car. I have called Pontiac about recalled g6's and ours is not a recall BUT it has a very similar problem. Can anyone please help give me a guiding way on what i should do, im lost here.