GM 9191639
Knuckle

To service and repair the Steering Knuckle, first, lift the vehicle and support on a jack-stand. If these parts are still there, take out the front wheel assembly, the Wheel Hub and all the pieces that were attached to it. Following this, take off the brake disc rotor splash shield bolts and the splash shield. Disconnect the ball nut stud in the outer tie rod and then apply the tie rod/wheel stud puller (J6627-A), which will pull apart the outer tie rod from the Steering Knuckle. Do the above and take off the Steering Knuckle bolts from the strut and the Steering Knuckle from the strut. Pull off the lower control arm ball stud pinch bolt and remove the Steering Knuckle from the lower control arm ball stud. For installation, bolt the Steering Knuckle on to the lower control arm pinched stud and insert this bolt in the rear-to-front direction of the vehicle and tighten with 100 nm (74 ft. Lbs). Then install Steering Knuckle to the strut using a new bolt, then insert them from half the vehicle's front to backside and tighten till snug. Mount the outer tie rod onto the Steering Knuckle and examine the threads of the ball stud for cleanliness and smoothing as well as to lightly file or sand any nicks on the ball stud taper. Put the outer tie rod into the Steering Knuckle, and tighten the tie rod ball stud to 30 nm (22 ft. Lbs), using linkage installer (J42089) so that it allows the ball stud taper seat. After de-installing the linkage installer (J42089), install a new self-locking tie rod nut and tighten it up to a torque of 60nm (44 ft. Lbs.). Fit back the brake disc rotor splash shield and bolts, tightening to 4 nm (35 inch lbs). Last, replace the Wheel Hub and front wheel assembly, lower the vehicle, and align the wheels.

Remove the steering knuckle bolts from the strut and then the steering knuckle from the strut.