🔧 Shock Absorbers - Rear Shock Absorber Replacement

Assumption: this is for the rear shocks on your Sierra. The front suspension on your truck uses separate components, so the steps below are for the rear shock absorbers only. You’ll replace them one side at a time, then repeat on the other side so the axle stays supported and stable.

Difficulty Level: Beginner | Estimated Time: 1.5-2.5 hours

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⚠️ Safety & Precautions

• Support the rear axle with a jack before removing each shock. Do not let the axle hang freely.
• Use jack stands on the frame. Never rely on the floor jack alone.
• Keep hands clear when lowering or raising the axle. The suspension can shift suddenly.
• If the truck has rusted shock bolts, use penetrating oil and work slowly to avoid breaking hardware.
• 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 for truck weight)
• Wheel chocks
• Safety glasses
• Work gloves
• 15mm socket
• 18mm socket
• 15mm wrench
• 18mm wrench
• Ratchet
• Breaker bar
• Torque wrench
• Penetrating oil

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Rear shock absorber - Qty: 2
• Rear shock mounting nuts - Qty: 4
• Rear shock mounting bolts - Qty: 4

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📋 Before You Begin

• Park on level ground.
• Set the parking brake.
• Chock the front wheels.
• Loosen the rear wheel lug nuts slightly if you plan to remove the wheels for more access.
• Spray the shock bolts with penetrating oil and let it soak for a few minutes.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Raise and support the rear of the truck

• Use the floor jack to lift the rear axle enough to unload the shocks.
• Place jack stands under the frame rails.
• Lower the truck carefully onto the stands.
• Keep the floor jack under the rear axle with light pressure so you can raise or lower it during removal.

Step 2: Remove the wheel for access

• Use the 19mm socket and ratchet to remove the rear wheel lug nuts if needed for access.
• Set the wheel aside.

Step 3: Remove the lower shock bolt

• Use the 18mm socket and 18mm wrench to remove the lower shock bolt and nut.
• If the bolt is tight, use the breaker bar for extra leverage.
• Keep the axle slightly supported.

Step 4: Remove the upper shock fastener

• Use the 15mm socket and 15mm wrench to remove the upper shock bolt or nut.
• Lower the axle a little with the floor jack if you need more room to pull the shock out.
• Remove the shock absorber from the truck.

Step 5: Install the new shock absorber

• Position the new shock in place by hand.
• Start the upper fastener first with the 15mm socket or by hand if possible.
• Install the lower fastener next with the 18mm socket and 18mm wrench.
• Torque to OEM specification. Use service information for the exact torque value on your truck.
• Do not fully tighten until both ends are started.

Step 6: Repeat on the other side

• Repeat Steps 3 through 5 on the opposite rear shock.
• Replace shocks in pairs so the rear suspension stays balanced.

Step 7: Reinstall the wheels and lower the truck

• Reinstall the rear wheel and hand-tighten the lug nuts.
• Raise the truck slightly with the floor jack, remove the jack stands, and lower it to the ground.
• Use the torque wrench to tighten the lug nuts to OEM specification.

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✅ After Repair

• Bounce the rear of the truck by hand and listen for clunks.
• Take a short road test over small bumps.
• Recheck the shock fasteners and lug nuts after the test drive.
• Inspect for any shifting, squeaks, or loose hardware.

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💰 DIY vs Shop Cost

Shop Cost: $350-$700 (parts + labor)

DIY Cost: $120-$280 (parts only)

You Save: $230-$420 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 1.5-2.5 hours.

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🎯 Ready to get started?

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