🔧 Front Wheel Bearing - Hub Assembly Replacement

This covers the front wheel bearing hub assembly on your Sierra. On this truck, the bearing is built into the hub, so the usual fix is replacing the whole hub assembly rather than pressing a bearing in and out.

Difficulty Level: Intermediate | Estimated Time: 2-3 hours

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⚠️ Safety & Precautions

• Work on a level surface and chock the rear wheels before lifting the front.
• Use jack stands. Never rely on a floor jack alone.
• If your Sierra has an ABS sensor in the hub, handle the sensor wire carefully so it does not get twisted or damaged.
• The brake system will be opened at the wheel end, so do not press the brake pedal with the caliper removed.
• No battery disconnect is required for this repair.

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🔧 Required Tools

You'll need the following tools for this repair:

• Floor jack (rated 3-ton minimum)
• Jack stands (rated 3-ton minimum)
• Wheel chocks
• Safety glasses
• Mechanic gloves
• 22mm lug nut socket
• 1/2-inch drive ratchet
• Breaker bar
• 10mm socket
• 15mm socket
• 18mm socket
• 21mm socket
• 36mm axle nut socket
• Torque wrench
• Trim clip tool
• Dead blow hammer
• Penetrating oil
• Bungee cord or wire hanger
• Wire brush

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Front wheel hub bearing assembly - Qty: 1 per side
• Front axle nut - Qty: 1 per side
• Brake caliper bracket bolts - Qty: 2 per side, if required by your hub service
• Brake cleaner - Qty: 1

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📋 Before You Begin

• Park on level ground and set the parking brake.
• Place wheel chocks behind both rear tires.
• Loosen the front lug nuts before lifting the truck.
• If the truck is equipped with a splash shield or wheel speed sensor harness clip, note its routing before removal.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Lift and secure the front of the truck

• Use a floor jack to lift the front end and support it with jack stands under the frame.
• Remove the wheel with a 22mm lug nut socket.
• Keep the truck stable before brake work.

Step 2: Remove the brake caliper and bracket

• Use a 15mm socket to remove the caliper slide pins, then hang the caliper with a bungee cord or wire hanger.
• Use an 18mm socket to remove the caliper bracket bolts.
• Remove the rotor by hand. If stuck, tap it gently with a dead blow hammer.
• Torque on reassembly: Caliper slide pins 43 Nm (32 ft-lbs); caliper bracket bolts 255 Nm (188 ft-lbs).

Step 3: Remove the axle nut

• Use a 36mm axle nut socket and breaker bar to remove the axle nut.
• If the axle starts to move outward, do not pull it out too far.
• Torque on reassembly: Axle nut 300 Nm (221 ft-lbs).

Step 4: Disconnect the wheel speed sensor if equipped

• Use a 10mm socket or trim clip tool to release the sensor harness from the steering knuckle.
• Unplug the connector carefully so the wire is not stretched.
• Do not pull on the wire.

Step 5: Remove the hub bearing assembly

• Use a 15mm socket to remove the three hub mounting bolts from the back of the knuckle.
• If the hub is seized in the knuckle, spray penetrating oil around the flange and tap the hub with a dead blow hammer.
• Remove the hub assembly from the knuckle.
• Torque on reassembly: Hub mounting bolts 133 Nm (98 ft-lbs).

Step 6: Clean and install the new hub

• Use a wire brush and brake cleaner to clean the knuckle mounting surface.
• Install the new hub assembly and start the bolts by hand with a 15mm socket.
• Tighten the hub bolts evenly.

Step 7: Reassemble the brakes and wheel

• Install the rotor, caliper bracket, and caliper using the same sockets as removal.
• Reinstall the axle nut with a 36mm axle nut socket.
• Reinstall the wheel and snug the lug nuts with a 22mm lug nut socket.
• Torque on reassembly: Lug nuts 190 Nm (140 ft-lbs).

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✅ After Repair

• Pump the brake pedal until it feels firm before moving the truck.
• Check for ABS warning lights after the test drive.
• Listen for noise changes at low and highway speed.
• Recheck lug nut torque after 25-50 miles.

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💰 DIY vs Shop Cost

Shop Cost: $450-$850 (parts + labor)

DIY Cost: $120-$250 (parts only)

You Save: $330-$600 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 2-3 hours.

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🎯 Ready to get started?

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