NHTSA Complaint #11480583 — 2014 CHEVROLET TRAVERSE

2014 CHEVY TRAVERSE LT. Randomly driving on the freeway @ 60-65mph going uphill it started losing power. It started stuttering/coughing. The TRACTION CONTROL OFF and SERVICE STABILITRAK lights flashed. I finally got it home and shut it off. The next morning it drove fine. Then it happened agai a few days later. I replaced the throttle body after it was diagnosed as the problem. On the way home it did the same thing. It wasn't the throttle body. Now they can't find out what is wrong with it. There are no codes. The service repair guys say it is overheating in the shop but not when they drive it and they don't know why.There are no codes. I told them it was random. If I am driving on the Interstate and have these problems and have to turn off the engine and sit for any amount of time is dangerous. Especially if the heat is over 100 degrees as it has been. I'm not sure if it is related to this problem, but my control panel lights go from dim to light randomly. I can't see anything on them during the day when dim. No warnings etc that may flash