🔧 Control Arms - Replacement

Assumption: Front lower control arms. If you meant upper control arms or rear arms, the part list and steps change.

The control arms locate the front wheels and keep the suspension geometry stable. Replacing them is a solid fix for clunks, wandering, uneven tire wear, or torn ball joint bushings.

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

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⚠️ Safety & Precautions

• Support the Sierra securely with jack stands before removing suspension components.
• Never work under a truck held only by a jack.
• The front suspension is under load; keep hands clear when loosening fasteners.
• If your truck has a torsion-bar-style front end, follow the correct suspension unloading procedure before removing control arm hardware.
• After repair, a wheel alignment is required.

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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
• Metric socket set
• Metric wrench set
• Breaker bar
• Torque wrench
• Ratchet
• Ball joint separator (specialty)
• Hammer
• Penetrating oil
• Safety glasses
• Mechanic gloves

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Front lower control arm - Qty: 2
• Front lower control arm bolts and nuts - Qty: 1 set
• Front sway bar link hardware - Qty: 1 set
• Front alignment - Qty: 1

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📋 Before You Begin

• Park on level ground and set the parking brake.
• Chock the rear wheels.
• Loosen the front lug nuts before lifting the truck.
• Raise the front and support the frame on jack stands.
• Remove the front wheel for access.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Remove the wheel

• Use a lug wrench or socket to remove the front wheel.
• Set the wheel aside where it cannot roll.

Step 2: Support the suspension

• Use a floor jack under the lower control arm or axle area to lightly support the suspension.
• This keeps the arm from dropping suddenly when bolts come out.

Step 3: Disconnect attached hardware

• Use the correct metric socket and wrench to remove any sway bar link, brake line bracket, or ABS wire brackets attached to the control arm area.
• Move lines and brackets out of the way so nothing gets stretched.
• Mark parts before removal.

Step 4: Remove the ball joint from the steering knuckle

• Use the correct socket and wrench to remove the lower ball joint fastener from the knuckle.
• Use a ball joint separator if the taper is stuck.
• Carefully separate the knuckle from the control arm.

Step 5: Remove the control arm mounting bolts

• Use a breaker bar and the correct metric socket to remove the inner control arm bolts.
• If a bolt is seized, spray penetrating oil and work it slowly.
• Remove the control arm from the truck.

Step 6: Install the new control arm

• Position the new control arm in place by hand.
• Install the inner mounting bolts first, then reconnect the ball joint to the knuckle.
• Do not fully tighten bushing bolts until the suspension is at ride height.
• Torque to factory specification.

Step 7: Reinstall brackets and hardware

• Use the correct socket and wrench to reinstall all brackets, clips, and links removed earlier.
• Make sure brake lines and ABS wires are routed exactly as before.

Step 8: Final tighten at ride height

• Lower the truck so the suspension is loaded normally.
• Use the torque wrench to tighten the control arm inner bolts to factory specification at ride height.
• This helps the bushings last longer.

Step 9: Reinstall the wheel

• Install the wheel and snug the lug nuts by hand first.
• Lower the truck fully, then torque the lug nuts in a star pattern to factory specification.

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✅ After Repair

• Check that the steering turns freely lock-to-lock.
• Look for loose brackets, torn boots, or stretched lines.
• Test drive slowly at first and listen for clunks.
• Schedule a four-wheel alignment immediately.

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💰 DIY vs Shop Cost

Shop Cost: $500-$1,200 (parts + labor)

DIY Cost: $180-$450 (parts only)

You Save: $320-$750 by doing it yourself!

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

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🎯 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.