my04chevy

I have a 2018 GMC Sierra and my lane assist works some of the time but the seats used to vibrate on the right and left sides depending on which way you were leaving the lane. The vibrations no longer work so I took it to the dealer today. They said they fixed it by adjusting the cameras. Driving home the lane assist is marginal at best and the seat vibrated once and never again. Back to the dealer again.