GM 15767252
Upper Control Arm, Rear

To replace the upper Control Arm in a 2500 series removes the tire and wheel then lift up the vehicle, support it, remove the tire and wheel. Afterwards, remove the retainer bolt for the brake hose and the wheel speed sensor brackets and the upper Ball Joint nut that should be thrown away. Use the Ball Joint separator (J-42188-B) to disconnect the upper Control Arm from the Steering Knuckle, as well as remove the upper Control Arm nuts and adjustment cams before removing the upper Control Arm. For installation, start from the installation of the new upper Control Arm therefore insisting on the fastener notice. Mount the upper Control Arm bolts and tighten the nuts to 190 n.m (140 lb ft). Connect the upper Control Arm to the Steering Knuckle and screw in a new nut onto the upper Ball Joint stud, tightening it to 50 n.m (39 lb ft). Replace the retaining bolts for brake hose, tightening them to 9 n.m (80-lb in), place the tire and wheel back on, do the lowering of the vehicle, and check the wheel alignment.

The first step to replace a rear axle upper control arm involves raising and supporting the vehicle. If your vehicle has an ESC sensor disconnect it before proceeding. Start by removing the upper control arm retaining bolt and nut from the frame bracket then move on to the axle bracket retaining nut and bolt before taking out the upper control arm. Installation begins by seating the upper control arm and applying retaining bolts to the axle bracket followed by frame bracket bolts and axle bracket nuts. The nuts must not be tightened until the suspension reaches curb height position during installation. Secure both retaining bolts that hold the upper control arm to 105 N.m torque (77 lb ft) after reconnecting the ESC sensor when present.

First, to service and repair rear upper control arm, raise and support the vehicle. If equipped, remove the Real Time Damping (RTD) sensor. Use the wrench mobility to remove the upper control arm retaining nut and bolt from the frame bracket, remove of the retaining nut and bolt from the axle bracket, then the upper control arm is removed. For installation, start with the upper control arm at the position and install the retaining bolt and nut to the axle bracket, then install the retaining bolt to the frame bracket. It is very important not to tighten nuts until you are at the curb height in the suspension. When you've fixed the upper control arm retaining nut, tighten the retaining bolts to 105 Nm(77 ft. lbs.); Last but not least, reconnect the RTD sensor where available and return the vehicle to the ground.

To replace the upper Control Arm, start by lifting and supporting the car, then take away the tires, then the wheels. Then unfasten the retaining bolt for brake hose and wheel speed sensor brackets, then slacken the nut on top of the Ball Joint, which should be discarded. Use the Ball Joint separator (J-42188-B) to remove the upper Control Arm out of Steering Knuckle. For 15-series 2wd/4wd and 25/35 series 2wd, remove the upper Control Arm nuts and the adjustment cams and then remove the Control Arm bolts and the upper Control Arm itself. Follow the same procedure to remove the upper Control Arm from 25/35 series 4wd. Upon installing the new upper Control Arm, make sure to use the right fasteners in the right positions based on the sequence and torque values to prevent damaging Control Arm or other parts. Mount upper Control Arm bolts for 25/35 series 4 wd, and then upper Control Arm nuts & adjustment cams, tighten nuts to 190 nm (140 lb ft). For 25/35 series 4wd, to install the upper Control Arm, upper Control Arm bolts, upper control art nuts and adjuster cams. For 15 series 2wd/4wd as well as for 25/35 series 2wd, repeat the installation procedure. Mount the upper Control Arm to the Steering Knuckle and add a new nut to a strategic location of the upper Ball Joint stud and tighten to 50 nm (37 lb ft). Unfasten the retaining bolts for brake hose and wheel speed sensor brackets and tighten them to 9 nm (80 lb in), then reinstall the tire and wheel. Lastly, take out the safety stands, lower the vehicle, and check the wheel alignment.

To replace the upper Control Arm, the first step is to lift the vehicle and support it, remove the tire and wheel. If found, disconnect the real time damping (RTD) link rod from the sensor and remove the retaining bolt of the brake hose and wheel speed sensor brackets. Next, unfasten the wheel drive shaft and the nut in the upper Ball Joint and discard the nut. Detaching the upper Control Arm from the Steering Knuckle using the Ball Joint separator (J43631). For 15 series 2wd, 4wd, and 25/35 series 2wd , take off upper control arms nuts and adjustment cams , upper Control Arm bolts . Do the same for the cut worms on the 25/35 series 4wd upper Control Arm nuts and adjustment cams and 25/35 series 4wd upper Control Arm bolts. When the upper Control Arm is removed, the new upper Control Arm should be put in place, including the upper Control Arm bolts for the 25/35 series 4 wd. Mount the upper Control Arm nuts and adjustment cams for 25/35 series 4wd and tighten nuts with the torque of 190 nm (140 ft. Lbs.). Then, tighten the bolts for the upper Control Arm for the 15 series 2wd, 4wd, and 25/35 series 2wd, nuts, and the adjustment cams for them, all to 190 nm (140 ft. Lbs.). Fasten the upper Ball Joint stud onto the upper Control Arm and attach another new nut and tighten it to 50 nm (37 ft. Lbs.), and installing the wheel drive shaft onto the Steering Knuckle and tighten it. Re-install the retaining bolts for the brake hose and wheel speed sensor bolts, tightening it up to 9 nm (80 inch lbs.), and attach the rtd link rod of the sensor if there is. Finally, install the tire and wheel, take out the safety stands, put the vehicle to the ground, and make sure that the wheel alignment is all right.

Use the Ball Joint Separator (J-42188-B).

The lower control arm retaining nuts and the retaining bolt.

Tighten them to 175 Nm (129 lb ft).

Remove the rear axle support and lower the vehicle.

160 N.m (118 lb ft).

Place the new lower control arm and secure it with the control arm bolts and washers, ensuring to follow the Fastener Notice.

Begin by raising and supporting the vehicle, then support the lower control arm with a safety stand.

Raise and support the vehicle.

100 Nm (74 lb ft) plus 55 degrees.

Reinstall the torsion bars, lower ball joint into the steering knuckle, and the wheel drive shaft.

First raise and support the vehicle, then support the lower control arm with a safety stand.

Detach the lower ball joint retaining nut and disconnect the lower ball joint stud from the steering knuckle using the J 43631 Ball Joint Separator and J 45851 Ball Joint Separator Protector Adapters.

Raise and support the vehicle.

Tighten to 175 Nm (129 lb ft).

Position the new lower control arm and secure it with the 15-series bolts and 25/35-series bolts, ensuring the washers are installed with the shoulder facing the arm.

Tighten the upper control arm retaining nut to 160 Nm (118 lb ft).

Detach the stabilizer shaft link from the lower control arm and, if equipped, remove the wheel drive shaft.

Nuts should not be tightened until the suspension is at the curb height position.

Tighten the bolts to 105 Nm (77 ft. lbs.).

The shock absorber lower nut and bolt.

Raise and support the vehicle.

Reinstall the wheel drive shaft and connect the lower ball joint stud to the steering knuckle, securing it with the retaining nut tightened to 100 Nm (74 ft. lbs.).

Install the upper control arm bolts and tighten them to 190 Nm (140 lb ft).

Install the front stabilizer shaft link, the shock absorber, the tire and wheel.

First, raise and support the vehicle, then remove the tire and wheel.

Ensure not to tighten the nuts until the suspension is at curb height.

The upper control arm retaining nut and bolt from both the frame bracket and the axle bracket.

Remove the rear axle support and lower the vehicle.

Remove and discard it.

Install a new nut and tighten it to 100 Nm (74 ft. lbs.).