Q: How can you inspect and potentially replace a balljoint on Cadillac DeVille and DTS?
A: To inspect and potentially replace a ball joint, start by applying the parking brake and blocking the rear wheels to prevent the vehicle from rolling. Then, raise the front of the vehicle and securely support it on jack stands. Next, use a large prybar to check for any movement in the ball joint by attempting to push it up and prying it down between the Steering Knuckle and the Control Arm. Additionally, have an assistant grasp the tire at the top and bottom and move the top of the tire in and out while touching the ball joint stud nut. Finally, separate the control arm from the steering knuckle and try to twist the stud in the socket using your fingers.