The front wheel bearings are sealed, non-adjustable units which require no periodic attention. They are bolted to the steering knuckle by means of an integral flange.
You will need a special tool to pull the bearing free of the halfshaft, GM tool no. J-28733 or the equivalent. You should also use a halfshaft boot protector, GM tool no. J-28712 or the equivalent to protect the parts from damage.
- Remove the wheel cover, loosen the hub nut, and raise and support the car. Remove the front wheel.
- Install the boot cover, GM part no. J-28712 or the equivalent.
- Remove and discard the hub nut. Be sure to use a new one on assembly, not the old one.
- Remove the brake caliper and rotor as follows:
- Remove the allen head caliper mounting bolts.
- Remove the caliper from the knuckle and suspend from a length of wire. Do not allow the caliper to hang from the brake hose. Pull the rotor from the knuckle.
- Remove the three hub and bearing attaching bolts. If the old bearing is to be reused, match mark the bolts and holes for installation. The brake rotor splash shield will have to come off, too.
- Attach a puller, GM part no. J-28733 or the equivalent, and remove the bearing. If corrosion is present, make sure the bearing is loose in the knuckle before using the puller.
- Clean the mating surfaces of all dirt and corrosion. Check the knuckle bore and knuckle seal for damage. If a new bearing is to be installed, remove the old knuckle seal and install a new one. Grease the lips of the new seal before installation; install with a seal driver made for the purpose, GM tool no. J-28671 or the equivalent.
- Push the bearing onto the halfshaft. Install a new washer and hub nut.
- Tighten the new hub nut on the halfshaft until the bearing is seated. If the rotor and hub start to rotate as the hub nut is tightened, insert a drift through the caliper and into the rotor cooling fins to prevent rotation. Do not apply full torque to the hub nut at this time-just seat the bearing.
- Install the brake shield and the bearing retaining bolts. Tighten the bolts evenly to 63 ft. lbs. (85 Nm).
- Install the caliper and rotor. Be sure that the caliper hose isn't twisted. Install the caliper bolts and tighten to 21-35 ft. lbs. (28-47 Nm).
- Install the wheel. Lower the car. Tighten the hub nut to 225 ft. lbs. (305 Nm).