GMC 19416899 ARM KIT,FRT UPR CONT<SEE GUIDE/CONTACT BFO>

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 down force of the spring, raising it just enough to free the upper control arm from the upper ball stud. Caution is advised, as removing the upper ball joint stud nut could release the full force of the spring, leading to severe injury. Next, 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 turn off the nut at the end of the ball stud, removing it along with any washers, and lift the upper arm to free the ball stud from the knuckle. Remove the upper control arm shaft-to-bracket nuts and lock washers, pulling the control arm, shaft, and shim packs off the bolts, and consider wiring the shim packs together to prevent loss. For installation, if control arm bushings need replacement, use a special tool to press them out, then assemble the new bushings into the arm and over the shaft from the outer ends, installing the washers and nuts while tightening them just firmly. Replace the control arm by positioning the outer shim packs on the mounting bolts, installing the control arm and shafts, and finally, installing the outer shim packs, followed by attaching and tightening the nuts to 46 ft. lbs. (62 Nm). Reverse the removal steps to complete the installation, tightening the ball joint stud nut to 60-65 ft. lbs. (81-88 Nm) and adjusting as necessary to align the castellation in the nut with the cotter pin hole in the stud before installing a new cotter pin. Finally, tighten the control arm bushing nuts with the vehicle supported by the suspension to specified torque values based on the model year, and tighten the upper control arm-to-frame nuts to 48 ft. lbs. (65 Nm).

To remove the upper control arm, start by loosening the wheel lug nuts and raising the front of the vehicle on jackstands. Support the vehicle securely and remove the wheel. Position a floor jack with a wood block under the lower control arm to relieve spring pressure on the upper control arm. Remove the air cleaner extension if necessary, and disconnect the brake hose bracket and ABS wheel speed sensor from the upper control arm. Disconnect the upper balljoint from the steering knuckle. On 2WD models, remove the pivot shaft nuts, bolts, and shims, noting their location. On 4WD models, mark the positions of the adjuster cams to the frame. Remove the upper control arm pivot bolts and nuts, and inspect the pivot bolt bushings for wear. Replace if necessary. To install the upper control arm, position it in the frame brackets and install the bolts and nuts, ensuring they are facing each other. Do not tighten completely. Attach the balljoint to the steering knuckle and connect the brake hose bracket. Install the wheel and lower the vehicle. Tighten the lug nuts and pivot bolt nuts to the proper specifications. Finally, install the air cleaner extension if it was removed.

Remove the front coil spring, followed by the control arm ball stud, and then take the control arm out of the vehicle. Upon inspection, if the control arm pivot bushings are worn, it is advisable to have them replaced by your GM dealer; however, if you choose to do this work without a press, use a long bolt and suitable tubular spacers for both removal and installation. Note that removing the control arm is not necessary for bushing replacement, except for the front bushings on 1975 and later models. For installation, follow the reverse of the removal procedure and torque-tighten the nuts to the specified torque.

Start by loosening the wheel lug nuts and raising the vehicle on jackstands to remove the control arm on a 2WD model. Remove the wheel, and then coil spring. To a dealer or shop equipped with all needed tools, take your control arm for replacement of any balljoint and bushings if necessary. When installing the control arm, follow reversal of removal steps noting that once the vehicle is at normal ride height, every fastener should be tightened to correct torque specs. The other method starts by loosening the wheel lug nuts and raising the vehicle on jackstands. After removing the wheel, front splash shield might be required in some cases. Disconnect both shock absorber and stabilizer bar from lower control arm. Finally detach lower balljoint from steering knuckle to remove torsion bar followed by lower control arm itself. Replacing control arm may depend on inspections made on its bushings which should appear either worn out or damaged. Raise it into position after positioning it correctly as you insert washers alongside pivot bolts of control arm without tightening them completely yet. When inserting cotter pin through lower nut's hole put floor jack up until ball joint stud can be seen inside steering knuckle hole and then tighten ball joint stud nut properly using correct torque wrench value set. Connect stabilizer bar; mount shock absorber;install torsion bar; do not forget about connecting stabilizer bar again; install cover over this part too, if needed.The last phase involves installation of wheels plus lug bolts and lowering vehicles as well before final tightening of lugs according to specified levels of torque.Tighten rearward pivot bolt types for correlation between current spindle angle readings as well as their prespecified torques when shield becomes applicable.Correct vehicle's levels at lateral points followed by regulating torsion bar until equal elevation attained largely across its body frame sections otherwise referred as maintaining levelness in such cases.

Remove the rear springs as specified.

Inspect the control arm pivot bushings; if they are worn, consider having them replaced by a GM dealer, or use a long bolt and tubular spacers for removal and installation if doing it yourself.

After removing the front coil spring, the control arm ball stud should be removed, and then the control arm can be taken out of the vehicle.

Attach the balljoint to the steering knuckle and connect the brake hose bracket. Install the wheel and lower the vehicle.

Inspect the control arm pivot bushings; if they are worn, replacement is best handled by a GM dealer.

Remove the pivot shaft nuts, bolts, and shims, noting their location.