GMC Sierra SLE 2016 Automatic Gasoline mileage: 192 KM Peace be upon you, how are you? I have a problem with my GMC Sierra, the shaking comes to the car when I'm driving on the highway at a speed of 110 to 130. I changed the tire size to 17 and did a wheel alignment, but the shaking did not disappear. I inspected the driveshaft and was told it's fine, and the torque converter (transmission's pumpkin) is excellent. What is the problem? Please advise, and how much would the repair cost?