The hub and bearing assembly is a sealed unit and isn't serviceable; if defective, it must be replaced. Begin by putting the vehicle in gear, applying the parking brake, and breaking loose the driveaxle/hub nut with a socket and large breaker bar. Loosen the wheel lug nuts, raise the vehicle, and support it securely on jackstands, ensuring that if equipped with Automatic Ride Control (ARC), the air suspension switch is turned to the OFF position before raising the vehicle to prevent damage to the system components. Remove the wheel and the driveaxle/hub nut, then unbolt the brake caliper and hang it out of the way with a piece of wire before removing the caliper anchor bracket and the Brake Rotors. For models with 4-wheel ABS (4WABS), detach the disc splash shield from the steering knuckle by removing three bolts, then take out the speed sensor retaining bolt, remove the sensor from the knuckle, and set it and the wire harness aside safely. Next, remove the hub assembly-to-steering knuckle bolts, tap the hub assembly from side-to-side to break it loose from the steering knuckle, and pull the hub assembly off the end of the driveaxle, wrapping the end of the driveaxle with a rag to prevent damage. If the hub is stuck on the splines, use a puller to free it. For installation, reverse the removal procedure, ensuring to lubricate the driveaxle splines with multi-purpose grease and tighten all fasteners to the specified torque.
