I was driving along the highway way at 60-65 mph when suddenly service traction control came on and vehicle started jerking and slowing down. As I tried to accelerate it continued to jerk and then just shut off completely. I hit the guard rail/ jersey wall on the drivers side because I had no control of the vehicle due to the vehicle shutting down. Upon taking it to the dealer after getting it home they stated it could be the junction box which is a known issue but they dont see anything wrong with it and cant duplicate the problem. Ive contacted various mechanics and get that its an electrical issue that Chevrolet is aware of but refuses to place a recall for it. I could have gotten seriously injured if not killed by this problem and safety issue.