To inspect the ball joint, place a jack under each lower
Control Arm between the suspension spring pocket and the ball joint, then raise the vehicle. Grasp the wheel at the 6 and 12 o'clock positions and shake it in and out, observing the
Steering Knuckle for any movement relative to the control arm; if the ball joint is loose, it must be replaced. For removal and installation on vehicles built between 1986-87, a special installer, GM tool J-29193 or equivalent, is required. Begin by turning the lug nuts counterclockwise just enough to break the torque, then raise the vehicle and place jackstands under the frame before removing the wheel and tire. Support the outer edge of the lower control arm with a jack to manage the spring's down force, raising it just enough to free the upper control arm from the upper ball stud. Remove the cotter pin from the upper ball joint stud, loosen the nut without removing it, and use a ball joint removal tool to press the ball joint downward until the tapered portion is free from the steering knuckle. Wire the knuckle and associated parts in place to protect the brake hose, then remove the nut from the ball stud along with any washers. Lift the upper arm to free the ball stud from the knuckle, center punch and drill out the four rivets attaching the ball joint to the control arm, and use a hammer and chisel to cut off the rivet heads before removing the ball joint. For installation, place the new joint into the control arm and secure it with the provided bolts and nuts, torquing to 8 ft. lbs. (11 Nm). For vehicles built between 1975-85, maneuver the ball stud through the upper control arm, install the washer if applicable, and tighten the ball joint stud nut to 60-65 ft. lbs. (81-88 Nm), aligning a castellated hole with the cotter pin hole before installing a new cotter pin. For vehicles built between 1986-87, position the ball joint stud in the steering knuckle, install the tool, and tighten its operating nut to 30 ft. lbs. (41 Nm), then remove the tool and tighten the ball joint stud nut to 65 ft. lbs. (88 Nm), aligning the castellation with the cotter pin hole before installing a new cotter pin. Finally, reverse the remaining steps of the removal procedure to complete the installation.