I took my track Sierra Model 2018 to the dealer in Saudi because there was sound coming when I drive over 100 KM so first they told me the problem was in the tiers then they say the suspension need to replace, when the mechanic try to replace a part on the suspension I found that there is a metal was under my car, then they call me and they think I fixed it my self I think when I had small Accident at the back side of my car few months ago they did replace it there without me knowing. I need to place complain against this dealer universal motors Agency Saudi Arabia estren province Dhahran .