Assumption: This covers the front wheel hub/bearing assembly on your Sierra. If you meant the rear bearings, the procedure is different.

🔧 Front Wheel Bearing - Replacement

The front wheel bearing on your Sierra is part of the hub assembly. When it gets noisy or loose, the usual fix is replacing the complete hub and bearing unit, not pressing in a separate bearing.

Difficulty Level: Intermediate | Estimated Time: 2-4 hours per side

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⚠️ Safety & Precautions

• Support the truck with jack stands; never work under a vehicle held only by a jack.
• Use caution around the brake system and heavy hub assembly.
• If the ABS sensor is integrated with the hub, handle it carefully to avoid damage.
• Do not hang the brake caliper by the hose.
• Battery disconnect is not required, but it helps prevent accidental ABS or brake warning lights if the wheel speed sensor is unplugged.

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🔧 Required Tools

You'll need the following tools for this repair:

• Floor jack (rated 3-ton minimum)
• Jack stands (rated for truck weight)
• Wheel chocks
• Safety glasses
• Nitrile gloves
• 22mm lug wrench or socket
• 18mm socket
• 21mm socket
• 36mm socket
• 3/8-inch drive ratchet
• 1/2-inch drive ratchet
• Breaker bar
• Torque wrench
• Bungee cord or mechanic's wire
• Flat-blade screwdriver
• Hammer
• Penetrating oil
• Wire brush

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Front wheel hub and bearing assembly - Qty: 2
• Front axle shaft nut - Qty: 2
• Brake caliper bracket bolts - Qty: 4
• Front hub mounting bolts - Qty: 6
• Wheel speed sensor pigtail or clip kit - Qty: 1

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📋 Before You Begin

• Park on level ground and set the parking brake.
• Place wheel chocks behind the rear tires.
• Loosen the front lug nuts before lifting the truck.
• If your truck has rust, spray the hub bolts and axle nut with penetrating oil and let it soak.
• Tip: Rust is the biggest time-killer here.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Raise and secure the truck

• Use the floor jack to lift the front of the truck at the proper lift point.
• Set the frame securely on jack stands.
• Remove the front wheel with the 22mm lug wrench or socket.

Step 2: Remove the brake caliper and bracket

• Use an 18mm socket to remove the caliper bracket bolts.
• Lift the caliper and bracket off as an assembly.
• Hang it from the suspension with bungee cord or mechanic's wire.
• Tip: Never let the brake hose carry the weight.

Step 3: Remove the brake rotor

• Slide the rotor off the hub.
• If it is stuck, use a hammer to tap the rotor hat or use the threaded removal holes if equipped.
• Set the rotor aside in a clean place.

Step 4: Remove the axle nut

• Use a 36mm socket and breaker bar to remove the front axle shaft nut.
• If the hub wants to spin, have an assistant press the brake pedal or reinstall a few lug nuts to hold the rotor temporarily.
• Remove the axle nut and discard it.

Step 5: Disconnect the wheel speed sensor

• Trace the ABS wheel speed sensor lead from the hub.
• Use a flat-blade screwdriver to release the clips and unplug the connector.
• Free the harness from the knuckle so it will not get damaged.

Step 6: Remove the hub mounting bolts

• Use an 18mm socket to remove the hub and bearing mounting bolts from the back of the knuckle.
• These bolts can be tight and rusty, so use a breaker bar if needed.
• Once the bolts are out, wiggle the hub assembly free.
• Tip: Penetrating oil helps a lot here.

Step 7: Remove the hub and bearing assembly

• Pull the hub straight out from the knuckle.
• If it is seized, tap around the hub face with a hammer while pulling outward.
• Clean the mating surface on the knuckle with a wire brush.

Step 8: Install the new hub and bearing assembly

• Position the new hub assembly into the knuckle.
• Install the hub mounting bolts by hand first.
• Use an 18mm socket to tighten them evenly.
• Torque to 177 Nm (130 ft-lbs).

Step 9: Reinstall the axle nut and sensor

• Slide the axle through the new hub and install a new axle nut.
• Use a 36mm socket to tighten the axle nut.
• Torque to 325 Nm (240 ft-lbs).
• Reconnect the wheel speed sensor harness and secure all clips.

Step 10: Reinstall the rotor, caliper, and wheel

• Reinstall the rotor.
• Install the caliper bracket using the 18mm socket.
• Torque to 221 Nm (163 ft-lbs).
• Reinstall the wheel and snug the lug nuts with the 22mm lug wrench or socket.
• Lower the truck and finish tightening the lug nuts in a star pattern.
• Torque to 190 Nm (140 ft-lbs).

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✅ After Repair

• Pump the brake pedal before moving the truck.
• Check for ABS warning lights.
• Road test at low speed first and listen for noise.
• Recheck lug nut torque after 25-50 miles.
• If the old bearing was noisy, replace the other side soon to keep things even.

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💰 DIY vs Shop Cost

Shop Cost: $450-$900 per side (parts + labor)

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

You Save: $330-$650 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 2-4 hours per side.

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🎯 Ready to get started?

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