Chevrolet 20917465 Rear Upper Control Arm Assembly

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To disconnect the lower control arm from the steering knuckle, follow these steps: Loosen the ball joint nut a few turns. Install a ball joint separator and break the ball joint loose from the knuckle. Remove the nut.

To finalize the installation of the upper control arm, follow these steps: Ensure that the marks made prior to disassembly are aligned. Tighten the nuts on the control arm to the torque specifications. Tighten the wheel lug nuts to the torque specifications. Have the front-end alignment checked and, if necessary, adjusted.

To remove the trailing arm, first loosen the rear wheel lug nuts and raise the rear of the vehicle, supporting it securely on jackstands placed underneath the frame rails. Block the front wheels to prevent the vehicle from rolling and remove the wheel(s). If equipped with Autoride, unbolt the height sensor linkage from the bracket on the trailing arm. Support the rear axle with a floor jack, then remove the nuts, washers, and bolts from each end of the trailing arm. Remove the arm and check the bushings for signs of deterioration. If replacement bushings are available, take the arm to have the old ones pressed out and the new ones pressed in. To install, raise the rear axle with a floor jack to simulate normal ride height, then tighten the fasteners to the torque specifications. To remove the track bar, raise the rear of the vehicle and support it securely on jackstands placed underneath the frame rails. Block the front wheels to prevent the vehicle from rolling and detach the parking brake cable from the clips on the arm. Remove the nuts/bolts from each end of the bar and remove the bar. Check the bushings in the bar for signs of deterioration. If replacement bushings are available, take the bar and the bushings to have the old ones pressed out and the new ones pressed in. To install, raise the rear axle with a floor jack to simulate normal ride height, then tighten the fasteners to the torque specifications.

To remove the upper control arm on a vehicle, first loosen the wheel lug nuts, raise the front of the vehicle, and support it securely on jackstands. Remove the wheel and position a floor jack under the lower control arm to take the spring pressure off the upper control arm. Mark the relationship of the adjusting cams to the brackets on the frame and unbolt the brake hose/wheel speed sensor bracket from the upper control arm. If working on a 4WD model, remove the driveaxle. To disconnect the upper control arm from the steering knuckle, loosen the upper balljoint nut a few turns, install a puller or ball joint separator, and break the ball joint loose from the knuckle. Remove the nut and upper control arm pivot bolts and nuts, noting which way the bolts are installed. To install the new upper control arm, position the arm in the frame brackets and install the bolts and nuts, but don't tighten them yet. Attach the ball joint to the steering knuckle, install a new nut, and tighten it to the torque specifications. The remainder of installation is the reverse of removal. Make sure the marks made prior to disassembly are aligned, then tighten the nuts to the torque specifications. Finally, tighten the wheel lug nuts to the torque specifications and have the front-end alignment checked and, if necessary, adjusted.

The initial steps to remove and install a lower control arm on a vehicle are as follows: Loosen the wheel lug nuts. Raise the vehicle. Support it securely on jackstands placed under the frame rails.

After disconnecting the ball joint, proceed with these steps: Remove the lower control arm pivot bolts and nuts, noting the orientation of the bolts and, on 4WD models, how the washers are installed. Pull the lower arm from its frame brackets.

The initial steps to remove the upper control arm on a vehicle are as follows: Loosen the wheel lug nuts. Raise the front of the vehicle. Support the vehicle securely on jack stands. Remove the wheel.

To install the new upper control arm, follow these steps:Position the arm in the frame brackets and install the bolts and nuts, but don't tighten them yet.Attach the ball joint to the steering knuckle.Install a new nut on the ball joint and tighten it to the torque specifications.

To disconnect the lower control arm from the steering knuckle, follow these steps: Loosen the ball joint nut a few turns. Install a ball joint separator and break the ball joint loose from the knuckle. Remove the nut.