This procedure covers the removal and replacement of the rear leaf spring shackle on a 2014-2018 Chevrolet Silverado 1500 RWD, which connects the rear of the leaf spring to the frame.

Warnings

Tools required

Parts

• Leaf spring shackle assembly × 1 — OEM or equivalent aftermarket shackle kit
• Shackle bushings (if not included in kit) × 4 — Usually included with shackle assembly
• Shackle bolt kit × 1 — Grade 8 bolts, nuts, and washers

Preparation

1. Park vehicle on level, solid surface and engage parking brake
2. Chock the front wheels securely in both directions
3. If shackle bolts appear rusted, spray with penetrating oil and allow to soak for several hours or overnight
4. Loosen wheel lug nuts 1/4 turn while wheel is on ground

Procedure

1. 1

   Raise and support vehicle
   Raise the rear of the vehicle using a floor jack at the rear axle differential housing. Lift high enough to allow wheel removal and working clearance. Place jack stands under the frame rails just forward of the rear spring mounts. Lower vehicle onto jack stands while keeping floor jack under the axle with slight upward pressure to support the axle weight and control spring tension.
2. 2

   Remove rear wheel
   Remove the lug nuts completely and remove the rear wheel on the side being serviced. Store the wheel clear of the work area.
3. 3

   Locate and clean shackle mounting area
   Locate the rear leaf spring shackle at the rear-most point where the leaf spring connects to the frame. Use a wire brush to clean dirt and rust from around the upper and lower shackle bolt heads and nuts. This will help prevent bolt breakage during removal.
4. 4

   Support leaf spring
   Position the floor jack directly under the rear leaf spring just forward of the shackle mounting point. Apply slight upward pressure to take tension off the shackle bolts. The jack should be high enough to support the spring but not lift the axle higher. This relieves stress on the shackle hardware.
   ⚠Do not over-lift the spring or you may damage brake lines, shock absorbers, or other components. Only apply enough pressure to support the spring weight.
5. 5

   Remove lower shackle bolt
   Using a 21mm socket on the bolt head and 21mm wrench on the nut, remove the lower shackle bolt that connects the shackle to the leaf spring eye. You may need to use a breaker bar if the bolt is seized. If the bolt spins with the nut, hold the bolt head with one wrench while turning the nut with another. Remove the bolt, nut, and any washers.
6. 6

   Remove upper shackle bolt
   Using a 21mm socket on the bolt head and 21mm wrench on the nut, remove the upper shackle bolt that connects the shackle to the frame bracket. Once removed, the shackle assembly should be free. Remove the shackle and note the orientation and position of any bushings or spacers for reinstallation.
7. 7

   Inspect mounting points
   Inspect the frame bracket and leaf spring eye for cracks, elongated holes, or excessive wear. Check that both mounting holes are clear of debris. Wire brush the mounting surfaces clean. If frame damage is present, consult a professional before proceeding.
   ⚠Cracked or damaged frame brackets are a safety concern and must be repaired or replaced before installing new shackles.
8. 8

   Install new shackle bushings
   If bushings are separate from the shackle assembly, install new bushings into the shackle eyes. Ensure bushings are fully seated and oriented correctly according to manufacturer instructions. Some bushings may require light lubrication with soapy water for installation.
9. 9

   Position new shackle assembly
   Position the new shackle between the frame bracket and leaf spring eye. Align the shackle so the mounting holes line up with both the frame bracket above and the spring eye below. The shackle should hang vertically or at a slight rearward angle when properly positioned.
10. 10

    Install upper shackle bolt
    Insert the upper shackle bolt through the frame bracket and shackle assembly. Install any required washers and thread the nut onto the bolt. Hand-tighten the nut but do not torque at this time. Ensure the bolt passes cleanly through all components without binding.
11. 11

    Install lower shackle bolt
    Insert the lower shackle bolt through the shackle and leaf spring eye. Install any required washers and thread the nut onto the bolt. Hand-tighten the nut but do not torque at this time. Verify the spring eye and shackle are properly aligned.
12. 12

    Lower vehicle to load suspension
    Carefully lower the floor jack supporting the leaf spring until the full vehicle weight is on the suspension. The suspension must be at normal ride height before torquing the shackle bolts. This prevents binding and premature bushing wear.
    ℹ️Torquing suspension components at full droop or full compression will cause premature bushing failure. Always torque with vehicle at ride height.
13. 13

    Torque shackle bolts
    With the vehicle weight on the suspension, torque both the upper and lower shackle bolts to manufacturer specifications. If specific torque values are not available on the new hardware, typical specification is 70-85 lb-ft for 1/2 inch diameter shackle bolts. Consult the shackle kit instructions for exact values. Hold the bolt head stationary while torquing the nut.
14. 14

    Reinstall wheel
    Reinstall the rear wheel onto the hub. Thread all lug nuts on by hand, then tighten in a star pattern to seat the wheel. Torque the lug nuts to specification using a star pattern.
    Torque spec

    Wheel Lug Nuts169 Nm (125 lb-ft)
15. 15

    Lower vehicle and final checks
    Raise the vehicle slightly to remove jack stands, then lower completely to the ground. Remove the floor jack and wheel chocks. Rock the vehicle side to side to settle the suspension, then perform a final visual inspection of the shackle installation to ensure all hardware is tight and properly seated.

Reassembly

1. If replacing both sides, repeat the entire procedure for the opposite side shackle
2. Verify all fasteners are torqued to specification before operating the vehicle
3. Check for adequate clearance between the shackle and any brake lines, wiring, or fuel lines

Verification

• Test drive the vehicle at low speed and verify no unusual noises from the rear suspension
• After 50-100 miles, re-check shackle bolt torque as new bushings may settle
• Visually inspect for any fluid leaks near the work area (brake fluid, differential oil)
• Verify the vehicle sits level and the rear suspension operates normally over bumps

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