GMC 12413045 Front Wheel Bearing

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To remove the hub and bearing assembly from a vehicle, start by putting the vehicle in gear, applying the parking brake, and breaking loose the driveaxle/hub nut with a socket and large breaker bar. Then, loosen the wheel lug nuts, raise the vehicle, and support it securely on jackstands. Remove the wheel and the driveaxle/hub nut. Next, unbolt the brake caliper and hang it out of the way with a piece of wire, and remove the brake disc. For models with four-wheel ABS, trace the electrical lead for the wheel speed sensor and unplug the electrical connector. Remove the hub assembly-to-steering knuckle bolts, as well as the brake disc shield and wheel speed sensor assembly. Tap the hub assembly from side-to-side to break it loose from the steering knuckle, and pull it off the end of the driveaxle. If the hub is stuck on the splines, use a puller to free it. To install the hub and bearing assembly, lubricate the driveaxle splines with multi-purpose grease and tighten all of the fasteners.

To check for excessive play, grasp the top and bottom of each tire and move the wheel in and out on the spindle. Any noticeable movement indicates the need for bearing inspection, repacking with grease, or replacement.

A bearing puller is needed.

Remove the hub assembly-to-steering knuckle bolts, as well as the brake disc shield and wheel speed sensor assembly.

To check for excessive play, grasp the top and bottom of each tire and move the wheel in and out on the spindle. Any noticeable movement indicates the need for bearing inspection, repacking with grease, or replacement.

Install the grease-packed inner bearing, a new seal, and the outer bearing. Place the washer and spindle nut, tighten it gently, spin the hub while tightening to approximately 20 ft-lbs, then loosen it 1/4-turn, and finally secure it snugly by hand with a new cotter pin and nut lock.

It is important to ensure that the bearing is tapped in fully and that the numbers on the bearing are visible from the outer end of the axle housing.

Remove the brake disc.

The bearing recess should be cleaned out.

The new bearing can be installed using a bearing installer or a piece of pipe against the outer bearing race.

After removing the outer bearing, proceed to remove the inner wheel bearing, clean all components thoroughly with solvent, and meticulously inspect the bearings and races for damage.