GM 88970119 Steering Knuckle

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To remove the wheel, first loosen the lug nuts, raise the vehicle, and support it securely on jackstands before taking off the wheel. Next, remove the brake caliper without disconnecting the hose and take off the brake disc, then disconnect the brake hose from the strut and hang the caliper from the coil spring using a piece of wire, ensuring it does not hang by the brake hose. If the vehicle has ABS, disconnect and remove the wheel speed sensor. Mark the relationship of the strut to the steering knuckle, then loosen the strut-to-steering knuckle nuts and bolts without removing them. Separate the tie-rod end from the steering knuckle arm, then remove the balljoint-to-lower arm bolt and nuts, prying the control arm and balljoint apart with a large prybar or screwdriver. Remove the driveaxle/hub nut and push the driveaxle from the hub, supporting the end with a piece of wire. If the axle is out, use a balljoint removal tool or small puller to detach the balljoint from the steering knuckle, noting that if the balljoint is in good condition, it can remain attached when replacing the hub bearings. Remove the strut-to-knuckle bolts and carefully separate the steering knuckle from the strut. For installation, guide the knuckle and hub assembly into position, inserting the driveaxle into the hub, then push the knuckle into the strut flange and install the bolts and nuts without tightening them yet. If reusing the balljoint from the old knuckle, connect it to the new knuckle and tighten the balljoint stud nut. Attach the balljoint to the control arm without tightening the bolt and nuts yet, then attach the tie-rod to the steering knuckle arm and tighten the strut bolt nuts, the balljoint-to-control arm bolt and nuts, and the tie-rod nut. Place the brake disc on the hub and install the caliper, followed by the driveaxle/hub nut, which should be tightened. Finally, install the wheel and lug nuts, lower the vehicle, tighten the lug nuts, and have the front-end alignment checked and adjusted if necessary.