GMC 15684320 Steering Knuckle

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To remove the front suspension of a vehicle, start by raising the front of the vehicle and supporting it securely on jack stands. Apply the parking brake for safety. Then, support the lower control arm with a jack to compress the coil spring to its normal ride height. Remove the wheel and disconnect the ABS wheel speed sensor. Next, remove the brake caliper and the brake disc/hub assembly. If equipped, remove the disc splash shield. Disconnect the tie-rod end from the knuckle and disconnect the ball joints from the steering knuckle. Finally, remove the steering knuckle. To install the front suspension, simply reverse the removal steps. Make sure to adjust the front wheel bearings and have the front wheel alignment checked afterwards.

Unbolt the brake caliper, hang it out of the way with a piece of wire, and remove the brake disc.

Support the lower control arm with a jack to compress the coil spring to its normal ride height.

Simply reverse the removal procedure, making sure to lubricate the driveaxle splines with multi-purpose grease and tighten all fasteners to the specified torque.

Finally, remove the steering knuckle.

To install the front suspension, simply reverse the removal steps. Make sure to adjust the front wheel bearings and have the front wheel alignment checked afterwards.

Put the vehicle in gear, apply the parking brake, and break loose the driveaxle/hub nut with a socket and large breaker bar.

Inspect the seal on the rear side of the knuckle and replace it if necessary by driving in a new seal with a socket that has a slightly smaller outside diameter.