🔧 Front Wheel Bearing Hub Assembly - Replacement

Assumption: This covers the front wheel bearing hub assembly on your 4WD Sierra 1500. On this truck, the front bearing is a sealed hub unit, so you replace the whole assembly instead of pressing in a bearing.

Noise that changes with speed, growling on turns, or ABS warnings can point to a worn hub bearing. The job is straightforward, but the axle nut and brake components add some weight and effort.

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

---

⚠️ Safety & Precautions

• Support the truck securely on jack stands; do not rely on a jack alone.
• Keep hands clear of the brake rotor and hub area while loosening the axle nut.
• If the truck has a rusted or seized hub, use controlled force only; do not damage the steering knuckle.
• Disconnect the negative battery cable if you need extra safety while working near ABS wiring.
• Do not hang the brake caliper by the hose. Use a hanger or wire.

---

🔧 Required Tools

You'll need the following tools for this repair:

• Floor jack (rated 3-ton minimum)
• Jack stands
• Wheel chocks
• Safety glasses
• Mechanic gloves
• Breaker bar
• Torque wrench
• 36mm axle nut socket
• 21mm socket
• 18mm socket
• 15mm socket
• 10mm socket
• Ratchet
• Long pry bar
• Rubber mallet
• Wire hanger or bungee strap
• Flat blade screwdriver
• Penetrating oil
• Wire brush

---

🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Front wheel bearing hub assembly - Qty: 1 per side
• Front axle nut - Qty: 1 per side
• Brake cleaner - Qty: 1

---

📋 Before You Begin

• Park on level ground and set the parking brake.
• Loosen the lug nuts before lifting the truck.
• Turn the steering wheel to give yourself better access to the side you are repairing.
• Have the new hub ready before removal so the knuckle is not left open too long.

---

🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Loosen the wheel and axle nut

• Use a breaker bar with a 36mm axle nut socket to break the axle nut loose while the truck is still on the ground.
• Use a 21mm socket to loosen the lug nuts, but do not remove them yet.
• Crack the axle nut loose first.

Step 2: Raise and support the truck

• Use a floor jack to lift the front of the truck.
• Set the frame securely on jack stands.
• Remove the wheel with the 21mm socket.

Step 3: Remove the brake caliper and rotor

• Use an 18mm socket to remove the caliper bracket bolts.
• Lift the caliper and bracket off as an assembly.
• Hang the caliper with a wire hanger or bungee strap.
• Remove the rotor. If it is stuck, use a rubber mallet to tap it free.
• Do not let the hose carry the weight.

Step 4: Disconnect the ABS sensor and harness

• Use a 10mm socket to remove the ABS sensor harness fasteners from the knuckle.
• Unclip the harness carefully so it will not twist or tear when the hub comes out.

Step 5: Remove the axle nut and push the axle back

• Remove the axle nut with the 36mm axle nut socket.
• Push the axle inward slightly so the splines clear the hub.
• If needed, use a rubber mallet and a flat blade screwdriver to help separate the axle from the hub.

Step 6: Remove the hub bolts

• Use a 15mm socket to remove the three hub-to-knuckle bolts from the back side of the knuckle.
• Spray penetrating oil if the bolts are rusty.
• Work the hub loose evenly.

Step 7: Remove the hub assembly

• Pull the hub straight out of the knuckle.
• If it is seized, use a long pry bar from the backside and a rubber mallet to work it free.
• Clean the mounting surface with a wire brush and brake cleaner.

Step 8: Install the new hub assembly

• Slide the new hub into place, aligning the bolt holes and axle splines.
• Install the hub bolts by hand first with the 15mm socket.
• Torque the hub bolts to 180 Nm (133 ft-lbs).

Step 9: Reinstall the axle nut, rotor, and brakes

• Push the axle fully into the new hub and install a new axle nut.
• Torque the axle nut to 300 Nm (221 ft-lbs).
• Reinstall the rotor.
• Reinstall the caliper bracket and torque the caliper bracket bolts to 190 Nm (140 ft-lbs).

Step 10: Reconnect ABS wiring and reinstall the wheel

• Reattach the ABS harness clips and fasteners with the 10mm socket.
• Install the wheel and hand-tighten the lug nuts with the 21mm socket.
• Lower the truck and torque the lug nuts to 190 Nm (140 ft-lbs) in a star pattern.

---

✅ After Repair

• Spin the wheel by hand and listen for smooth operation.
• Start the truck and check for ABS or traction control warnings.
• Test drive slowly at first and listen for noise changes while turning.
• Recheck lug nut torque after the first short drive.

---

💰 DIY vs Shop Cost

Shop Cost: $450-$800 per side (parts + labor)

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

You Save: $300-$550 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.

---

🎯 Ready to get started?

HowToo makes it easy: same-day/2-day shipping on every part, plus all the tools and specialty tools you need! Check out the parts and tools sections below to add everything to your cart.