GM 15877580 Stud Asm,Front Lower Control Arm Ball

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To remove a pickle fork, start by loosening the wheel lug nuts and raising the vehicle on jack stands. Remove the wheel and then remove the cotter pin from the ball joint stud. Loosen the nut a few turns but don't remove it yet. Use a pickle fork-type ball joint wedge to separate the ball joint from the steering knuckle. Remove the ball joint stud nut. Alternatively, you can use a puller method. Follow the same steps of loosening the lug nuts, raising the vehicle, and removing the wheel. Remove the cotter pin and loosen the nut on the ball joint stud. Install a special puller and pop the ball joint stud from the steering knuckle. If the special puller is not available, strike the steering knuckle near the side of the ball joint with a hammer while pulling the ball joint out. If necessary, remove the drive axle first. For all models, remove the control arm and drill out the ball joint rivets. Use a 5/16-inch starter hole and a 31/64-inch drill bit. Install the new ball joint using the supplied bolts and tighten them to the torque specifications. Reverse the removal steps, tightening the ball joint to knuckle nuts and control arm bolts to the torque specifications. Use a new cotter pin and align the hole in the ball stud with the slots in the nut. Install the wheel, lower the vehicle, and tighten the lug nuts. Finally, have the front wheel alignment checked and adjusted if necessary.