NHTSA Complaint #11549834 — 2014 GMC ACADIA

I have been having the same issue with my car for 11 months now. My car has been in the shop more than in my possession. I have paid for repairs that did not solve the problem as well as thousands in car rental fees. When I am driving my car at over 70 MPH on the expressway the dash board lights up with a check engine light and then reads traction control turned off, service stabilitrak and the reduced engine power. The car then reduces down to just over 30 MPH right in the middle of the expressway. I've barely missed several accidents that could have killed someone. I have been in and out of the dealership as well as contacted GMC directly. This seems to be a common issue in this make and model of GMC (2014 ACADIA) and I am getting no where with any help or compensation from them. I was just quoted today for another almost $1900.00 repair that may not even solve the issue. I am still paying on this vehicle and am a front line worker who relies on this vehicle as I am a traveling Occupational Therapist. I don't think it's right that big business can just run over the little guys like this, not to mention the safety aspect and possible death can result in this issue. They have also not fixed the recall on the air bags which can lead to death as well. Please tell me there is something can be done about this.