Tools and Materials:
- Replacement Hub Bearing Assembly
- Socket Set and Wrenches
- Jack and Jack Stands
- Lug Wrench
- Flathead Screwdriver (or pry bar)
- Copper/Rubber Mallet (Soft-Faced Hammer)
- Safety Glasses and gloves
- Loctite or Thread Locker
- Grease (compatible with your vehicle)
- Axle Nut Socket (if applicable)
- Torque Wrench
Procedure:
1. Preparation:
- Park your Trailblazer on a flat surface and apply the parking brake.
- Loosen the lug nuts on the wheel where you need to replace the hub bearing, but don't remove them completely.
- Jack up your vehicle and safely secure it on jack stands.
- Remove the lug nuts and take off the wheel.
2. Dismantling the Hub Assembly:
- Use a flathead screwdriver or pry bar to carefully remove the hubcap and dust cover.
- Disconnect the ABS (Anti-lock Brake System) sensor connector if applicable.
- Remove the axle nut (if present). It may require an axle nut socket.
- Use a soft-faced hammer and punch (or a suitable tool) to drive the CV axle or half-shaft out of the hub.
3. Removing the Old Bearing:
- Remove the bolts or screws securing the hub bearing assembly to the steering knuckle or spindle.
- Gently tap the hub bearing assembly out of its housing with a soft-faced hammer. Be careful not to damage the steering knuckle.
4. Installing the New Bearing:
- Prepare the new hub bearing assembly by applying a thin layer of grease to the bearing surfaces according to the manufacturer's instructions.
- Position the new hub bearing assembly into the steering knuckle or spindle.
- Secure it in place using the bolts or screws you removed earlier. Tighten them to the specified torque using a torque wrench.
5. Reassembling the Hub:
- Reinsert the CV axle or half-shaft into the hub assembly, making sure it seats properly.
- Reinstall the axle nut (if applicable), tightening it to the manufacturer's specifications.
- Reconnect the ABS sensor connector if applicable.
6. Final Steps:
- Reattach the dust cover and hubcap.
- Place the wheel back on and tighten the lug nuts.
- Lower your vehicle from the jack stands.
- Double-check all bolts and nuts to ensure they are properly tightened.
7. Test Drive:
- Take your Trailblazer for a test drive and listen for any unusual noises or vibrations. Make sure everything is functioning properly before regular use.
Remember that working with suspension components can be complex, so always prioritize safety and consult a professional mechanic or refer to your vehicle's repair manual if you have any doubts during the process.
