GM 25696387 Wheel Hub

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For installation, the steps of removal should be reversed, ensuring that the bolts are tightened to the specified torque. Additionally, the brake fasteners should be tightened to the torque specifications.

To remove the hub and bearing assembly, start by applying the parking brake and blocking the rear wheels to prevent the vehicle from rolling. Then, remove the hubcap or wheel cover and loosen the driveaxle/hub nut. Next, loosen the wheel lug nuts, raise the front of the vehicle, and support it securely on jackstands. Remove the wheel and the brake caliper, and hang it out of the way with a piece of wire. Disconnect the ABS speed sensor electrical connector. Remove the driveaxle/hub nut by inserting a prybar through the caliper inspection window and into the cooling vanes of the brake disc to hold the hub stationary while removing the nut. Pull the brake disc off the hub. Attach a puller to the hub flange and tighten it just enough to push the driveaxle in a little, breaking loose the splines from the hub. Remove the hub retaining bolts, either through the opening in the hub flange or from the back side of the steering knuckle. Wiggle the hub and bearing assembly back and forth and pull it out of the steering knuckle, along with the brake disc shield if equipped. If the hub and bearing assembly are being replaced with a new one, it is recommended to replace the dust seal in the back of the steering knuckle. To replace the seal, disconnect the stabilizer bar and the balljoint from the control arm and pull the steering knuckle and strut assembly off the driveaxle stub shaft. Pry the seal out of the knuckle with a screwdriver. To install the new hub and bearing assembly, drive the new dust seal into the knuckle, if removed, and install a new o-ring around the rear of the bearing. Clean the mating surfaces on the steering knuckle, bearing flange, and knuckle bore. Lubricate the outside diameter of the bearing and the seal lips with high-temperature grease and insert the hub and bearing into the steering knuckle. Position the brake disc shield, if equipped, and install the three bolts. Install the driveaxle, if removed, and attach the control arm to the steering knuckle, if separated. Install the brake disc and caliper, and reconnect the ABS speed sensor electrical connector. Finally, install the driveaxle/hub nut, the wheel, and lower the vehicle. Tighten the lug nuts and the driveaxle/hub nut to the specified torque.

To remove the rear wheel, start by loosening the lug nuts. Then, block the front wheels to prevent the vehicle from rolling. Next, raise the rear of the vehicle and securely support it on jackstands placed under the frame. Once the vehicle is properly supported, remove the rear wheel. After that, remove the rear brake caliper, mounting bracket, and brake disc. It is important to hang the caliper with a piece of wire to avoid damaging the brake hose. If the vehicle is equipped with ABS, disconnect the ABS connector. To remove the hub and bearing assembly, rotate the hub to align one of the holes in the flange with each of the mounting bolts and remove the bolts. Finally, remove the hub and bearing assembly. For installation, simply reverse the steps of removal, ensuring that the bolts are tightened to the specified torque. Additionally, tighten the brake fasteners to the torque specifications.