I too have a 2015 Tahoe LTZ having issues with driver seat moving/shifting especially when turning/braking, knocking noise in steering column when turning the wheel and when stopped at a red light the engine shutters and hesitates like its about to kill I only have 15,000 miles on it and its sad because we purchased this vehicle after having a defective Dodge Durango just to spend more money on a vehicle and have issues all over again the vehicle is currently in the shop for these problems hopefully we made the right decision by purchasing it through a local dealership that will help get our issues resolved