Engine Belts And Pulleys problems of the 2015 Chevrolet Tahoe

On may 31, 2018 I purchased a 2015 chevy Tahoe ltz with 30,000miles that had been traded in at a local Ford dealership. Within days of purchasing it, the car began having issues with a stabilitrak warning followed by other erratic computer warnings. In following weeks the car also began having complete power failure at low speeds while turning and continues to have these problems to date. The engine also began smoking in July, caused, as it turns out, by a jammed belt on the air conditioner compressor. This vehicle has had many power failures in parking lots, on streets, the highway tunnel in boston and most recently on labor day weekend when the car stalled in charlestown, ri while slowing down at an intersection. I had no warning flashers or brake lights and the doors would not open. With the help of the local police dept. Who assisted me until the car restarted, I was able to drive it to a local residence. The Ford dealership sent a flatbed truck to tow it back to the facility where I purchased it. The dealership continues to return the car to me as it doesn't fail when they drive it due to its erratic nature, and service by several gm dealers they have sent it to have not been able to fix the problems either. I am stunned to learn that this vehicle is not on the recent recall list from gm regarding power steering issues at slow speeds. In a phone call to gm customer assistance on 9/21/18 (case number 8-4650063752) the representative confirmed that my vehicle was not on the list. I trust that by reporting these problems to you gm will be able to resolve this issue and insure my safety and those around me while driving. I appreciate your assistance and would be happy to provide any documentation I have available if requested. Attached are pictures of the vehicle and the id plate from the side of the car.