This procedure covers the removal and replacement of the front upper control arm on a 2014-2018 Chevrolet Silverado 1500 with 5.3L V8, including disconnecting the ball joint and control arm mounting bolts.

Warnings

Tools required

Parts

• Upper control arm assembly × 1 — Use OEM specification or equivalent
• Cotter pin × 1 — 3/16 inch standard

Preparation

1. Park vehicle on level ground and engage parking brake
2. Loosen front wheel lug nuts while vehicle is on ground (do not remove)
3. Raise front of vehicle and support securely on jack stands under the frame rails
4. Remove front wheel completely on the side being serviced
5. Spray penetrating oil on control arm bolts and ball joint nut; allow to soak 10-15 minutes
6. Support lower control arm with floor jack positioned under the lower ball joint area to control suspension movement

Procedure

1. 1

   Remove ball joint cotter pin
   Locate the upper ball joint nut at the top of the steering knuckle. Use a punch and hammer to straighten the cotter pin legs, then remove the cotter pin completely using needle nose pliers. Discard the old cotter pin.
2. 2

   Loosen ball joint nut
   Using an 18mm socket and breaker bar, loosen the upper ball joint nut but do not remove it completely yet. Leave the nut threaded on approximately 2-3 turns to protect the ball joint stud threads during separation.
   ⚠Do not fully remove the nut yet as it prevents the ball joint from suddenly separating and causing injury.
3. 3

   Separate ball joint from knuckle
   Insert a ball joint separator or pickle fork between the upper control arm and the steering knuckle at the ball joint. Strike the separator tool firmly with a hammer to break the taper fit. Once the joint separates, remove the ball joint nut completely and lower the knuckle away from the control arm.
   ⚠Ball joint may separate suddenly. Ensure the knuckle assembly is supported by the lower control arm and floor jack.
4. 4

   Remove front control arm bolt
   Locate the front mounting bolt that secures the upper control arm to the frame bracket. This bolt runs horizontally through the front bushing. Use a 21mm socket and wrench to remove the bolt completely. The bolt head faces outward (toward the wheel) and the nut is on the inboard side. Note the orientation and any shims or washers for reinstallation.
5. 5

   Remove rear control arm bolt
   Locate the rear mounting bolt that secures the upper control arm to the frame bracket. Use a 21mm socket and wrench to remove this bolt completely. The rear bolt also runs horizontally through the rear bushing. Support the control arm as you remove the final bolt.
6. 6

   Remove upper control arm
   With both mounting bolts removed, carefully maneuver the upper control arm out of the frame brackets. The arm may need to be rotated or tilted to clear the frame and other suspension components. Inspect the frame mounting area and clean any rust or debris with a wire brush.
7. 7

   Install new upper control arm
   Position the new upper control arm into the frame brackets, ensuring proper orientation (ball joint facing down toward knuckle). Insert the front mounting bolt first through the frame bracket and bushing, leaving it loose. Then insert the rear mounting bolt. Hand-tighten both bolts but do not torque yet.
   ℹ️Verify the control arm is positioned correctly with the ball joint stud pointing downward and alignment cams (if equipped) properly oriented.
8. 8

   Connect ball joint to knuckle
   Raise the steering knuckle using the floor jack under the lower control arm until the upper ball joint stud can be inserted through the knuckle hole. Install the ball joint nut and tighten it hand-tight initially.
9. 9

   Torque ball joint nut and install cotter pin
   Using a torque wrench and 18mm socket, torque the upper ball joint nut to specification. Continue tightening until the castellated nut aligns with the cotter pin hole in the ball joint stud (do not back off to align). Install a new cotter pin through the hole and bend the legs to secure.
   ⚠Never loosen the nut to align the cotter pin hole. Only tighten further if needed for alignment.
   Torque spec

   Ball Joint Nut110 Nm (81 lb-ft)
10. 10

    Reinstall wheel and lower vehicle
    Install the wheel and hand-tighten the lug nuts in a star pattern. Carefully lower the vehicle until the tire just touches the ground but the suspension is not yet fully loaded. Remove the jack stands and lower the vehicle completely so the full weight rests on the wheels.
11. 11

    Torque control arm bolts at ride height
    With the vehicle weight fully on the wheels (at normal ride height), torque both upper control arm mounting bolts to specification. This ensures the bushings are not pre-loaded in a twisted position. Torque front bolt first, then rear bolt.
    ℹ️Torquing at ride height is critical to bushing longevity. Failure to do so will cause premature bushing wear and failure.
    Torque spec

    Control Arm Bolts165 Nm (122 lb-ft)
12. 12

    Final torque wheel lug nuts
    Using a torque wrench and 21mm socket, torque all wheel lug nuts to specification in a star pattern to ensure even seating of the wheel.
    Torque spec

    Wheel Lug Nuts169 Nm (125 lb-ft)

Reassembly

1. Ensure new cotter pin is properly installed and bent to prevent backing out
2. Verify all fasteners are torqued to specification at proper ride height
3. Double-check that no tools or parts were left in the wheel well area

Verification

• Test drive the vehicle at low speed and verify no unusual noises from the front suspension
• Check for proper steering response and verify the steering wheel is centered when driving straight
• Schedule a professional wheel alignment within 50 miles as replacing the upper control arm will affect camber and caster settings
• After 50-100 miles, re-check the torque on all fasteners including ball joint nut and control arm bolts
• Visually inspect the ball joint cotter pin to ensure it is still properly secured

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