GM 19210782 Stud Kit,Front Lower Control Arm Ball

Inspect the control arm balljoints for looseness anytime either of them is separated from the steering knuckle by attempting to turn the ballstud in its socket with your fingers; if the balljoint is loose or the ballstud can be turned, replace the balljoint. To check the upper balljoints, raise the front of the vehicle and support it securely on jackstands, then place a floor jack under the outer end of the lower control arm and raise it slightly. Use a large prybar inserted between the upper control arm and the steering knuckle to pry upwards, allowing for up to 0.020-inch of vertical movement, which can be measured with a dial indicator. If balljoint replacement is indicated for 2003 and later models, the upper control arm must be replaced. For 2002 and earlier models, loosen the wheel lug nuts, raise the front of the vehicle, support it securely on jackstands, remove the wheel, and support the outer end of the lower control arm with a floor jack. Remove the brake caliper, unbolt the brake hose bracket and wheel speed sensor harness from the upper control arm, center-punch the rivet heads that mount the upper balljoint, and carefully drill them out. Use a punch to remove the remaining rivet portions, then remove the balljoint stud nut and separate the balljoint from the steering knuckle. Inspect the tapered hole in the steering knuckle for wear; if it is worn or out of round, the steering knuckle should be replaced. Installation is the reverse of removal, using appropriate fasteners to secure the replacement balljoint and tightening them securely. For lower balljoints, raise the front of the vehicle and support it securely on jackstands, then place a floor jack under the lower control arm and raise it until the upper control arm lifts off its rebound bumper. Insert a prybar between the control arm and the steering knuckle to check for play, allowing for up to 0.020-inch of vertical movement. For 2002 and earlier models, follow similar steps to remove the wheel and brake caliper, separate the lower balljoint from the steering knuckle, and guide the lower control arm ballstud out of the steering knuckle. The balljoint is press fit into the lower control arm, requiring a special press tool for removal and installation, which can be rented from equipment rental yards or auto parts stores. Inspect the tapered hole in the steering knuckle for wear, and installation is the reverse of removal, ensuring to tighten the ballstud nut and install a new cotter pin. For 2003 and later models, remove the lower control arm, as the balljoint is press fit and secured by crimped areas on the balljoint body, requiring a hammer and chisel to knock back the crimped areas before pressing out the balljoint with a hydraulic press. The new balljoint is then pressed into the lower control arm and crimped in place, and if a hydraulic press is not available, the control arm should be taken to a qualified repair facility for replacement.