I have same problem, i just replace steer drums and brakes , now truck will shake around 45 to 70 mph , it was fine before , it’s a 2016 cascadia...
Thank you I really didn’t know what this ecas is in my truck , thanks for video
Anyone know what this light mean on my 2016 cascadia dd15 , truck seems to be fine , just start blinking couple times then stay on for 20 miles...