🔧 Front Wheel Bearing / Hub Assembly Replacement

Assumption: This guide covers both front wheel bearing hub assemblies on your Sierra. On this truck, the front bearing is serviced as a complete hub assembly, not pressed apart.

The front hubs support the weight of the truck and let the wheels spin smoothly. If you hear humming, grinding, or feel play in the steering, replacing both sides together is the best way to keep the front end even.

Difficulty Level: Advanced | Estimated Time: 3-5 hours total

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⚠️ Safety & Precautions

• Work on level ground and chock the rear wheels.
• Support the truck with jack stands. Do not rely on a jack alone.
• Front wheel bearings are heavy and secured tightly. Keep hands clear when removing the hub.
• Disconnect the battery if the ABS sensor connector must be moved near exposed wiring.
• Do not let the brake caliper hang by the hose.
• If equipped with ABS, handle the wheel speed sensor and harness carefully.

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🔧 Required Tools

You'll need the following tools for this repair:

• Floor jack (rated 3-ton minimum)
• Jack stands
• Wheel chocks
• 21mm socket
• 24mm socket
• 15mm socket
• 18mm socket
• 10mm socket
• Ratchet
• Breaker bar
• Torque wrench
• Socket extension
• Bungee cord or caliper hanger
• Flat-blade screwdriver
• Rubber mallet
• Penetrating oil
• Gloves
• Safety glasses

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Front wheel bearing / hub assembly - Driver side - Qty: 1
• Front wheel bearing / hub assembly - Passenger side - Qty: 1
• ABS wheel speed sensor bolt or clip - Qty: 2
• Brake caliper bracket bolts - Qty: 4
• Hub mounting bolts - Qty: 6

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📋 Before You Begin

• Park on level ground, set the parking brake, and chock the rear wheels.
• Loosen the front lug nuts before lifting the truck.
• Turn the steering wheel for better access if needed.
• Replace both sides together for even wear and noise reduction.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Raise and secure the front of the truck

• Use a floor jack to lift the front end.
• Place jack stands under the frame and lower the truck onto them.
• Remove both front wheels with a 21mm socket.

Step 2: Remove the brake caliper and rotor

• Use an 18mm socket to remove the brake caliper bracket bolts.
• Remove the caliper and bracket as an assembly.
• Hang the caliper with a bungee cord or caliper hanger.
• Slide off the brake rotor. If it is stuck, tap it lightly with a rubber mallet.

Step 3: Disconnect the ABS sensor lead

• Use a 10mm socket if a retaining bolt is present.
• Release the ABS wire clips from the knuckle with a flat-blade screwdriver.
• Do not pull on the sensor wire itself.

Step 4: Remove the hub mounting bolts

• Use an 18mm socket with a breaker bar to remove the three hub bolts from the back of the steering knuckle.
• Spray penetrating oil on the bolt heads and hub flange if rusted.
• Use steady pressure, not impact on the bolt heads.

Step 5: Remove the wheel bearing hub assembly

• Pull the hub assembly straight out of the knuckle.
• If it is seized, tap around the hub flange with a rubber mallet.
• Clean the knuckle mounting surface before installation.

Step 6: Install the new hub assembly

• Position the new hub in the knuckle and align the bolt holes.
• Install the hub bolts by hand first.
• Use an 18mm socket and torque wrench to tighten the hub bolts.
• Torque to 175 Nm (129 ft-lbs) for the hub mounting bolts.

Step 7: Reconnect the ABS wiring

• Reinstall the ABS sensor wire clips and bolt if equipped.
• Make sure the wire is routed away from the tire and suspension.
• Check that the connector is fully locked in place.

Step 8: Reinstall the rotor, caliper, and wheel

• Install the brake rotor.
• Reinstall the caliper bracket using an 18mm socket.
• Torque to 190 Nm (140 ft-lbs) for the caliper bracket bolts.
• Reinstall the wheel and snug the lug nuts with a 21mm socket.
• Torque to 190 Nm (140 ft-lbs) for the wheel lug nuts in a star pattern.

Step 9: Repeat on the other side

• Repeat the same steps for the opposite front wheel bearing.
• Use the same torque specs and installation steps.

Step 10: Final check

• Lower the truck off the jack stands.
• Pump the brake pedal until it feels firm.
• Spin each front wheel by hand and check for rubbing or noise.

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✅ After Repair

• Road test at low speed first and listen for noise.
• Check ABS warning lights after driving.
• Recheck lug nut torque after 25-50 miles.
• Confirm there is no wheel play by rocking each front tire at the 12 and 6 o'clock positions.

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💰 DIY vs Shop Cost

Shop Cost: $700-$1,500 for both front hubs (parts + labor)

DIY Cost: $260-$700 for both front hubs (parts only)

You Save: $440-$800 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 3-5 hours total.

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🎯 Ready to get started?

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