Front Upper Control Arm with Ball Joint for 2020-2025 Chevrolet Silverado 2500 HD & More - Dorman 521-678

$99.99
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Dorman - OE Solutions Suspension Control Arm and Ball Joint Assembly 521-678
Dorman - OE Solutions Suspension Control Arm and Ball Joint Assembly 521-678

Vehicles this part fits
    Part number: 521-678
    UPC: 019495425571
    Condition: New
    Weight: 9.60 LBS
    Item Package Quantity: 1
    $99.99

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    Dorman - OE Solutions Suspension Control Arm and Ball Joint Assembly P/N:521-678
    Dorman - OE Solutions Suspension Control Arm and Ball Joint Assembly P/N:521-678
    $99.99
    $99.99

    Help keep your truck's front end steady and predictable with this Dorman control arm, part number 521-678, a front upper control arm with ball joint that installs as one pre-assembled unit. It fits many vehicles, among them the 2020-2025 Chevrolet Silverado 2500 HD, 2020-2025 Chevrolet Silverado 3500 HD and 2020-2025 GMC Sierra 2500 HD. See the "Vehicles it fits" section for the full list and engine details.

    • Direct replacement: Designed to directly replace the original front upper assembly on specific vehicle applications.
    • Pre-assembled repair: The ball joint and bushings arrive pre-installed, saving time and labor on the job.
    • Tested engineering: Went through an industry-leading evaluation process aimed at a smooth ride, directional stability and predictable dynamics.
    • Corrosion protection: Additional coatings help the arm resist rust and corrosion.

    The upper control arm links the steering knuckle to the frame, guiding the wheel through its suspension travel while the ball joint gives it a pivot point for steering. As a Dorman suspension control arm and ball joint assembly, 521-678 lets you swap the arm, ball joint and bushings in one step. If a worn upper ball joint or bushing is the cause of loose steering or clunking, this unit replaces those components together. A wheel alignment check after installation is recommended.

    Interchange: CA13112 · 84682566 · 84735902 · RK623896 · CMS501355

    This part cross-references / interchanges with the following part numbers:

    CA13112, 84682566, 84735902, RK623896, CMS501355

    Frequently Asked Questions

    What does a front upper control arm with ball joint do?

    It connects the steering knuckle to the frame, letting the wheel move up and down with the suspension while the ball joint provides a pivot point for steering.

    Does this Dorman suspension control arm come with the ball joint and bushings?

    Yes. The ball joint and bushings come pre-installed on the arm, which saves the time and labor of pressing them in separately.

    Which trucks does part 521-678 fit?

    It fits many vehicles, including the 2020-2025 Chevrolet Silverado 2500 HD, 2020-2025 Chevrolet Silverado 3500 HD and 2020-2025 GMC Sierra 2500 HD. Check the "Vehicles it fits" section to confirm your truck.

    What are signs an upper control arm or ball joint may need replacing?

    Common signs include clunking over bumps, loose or wandering steering, uneven tire wear, and play or a damaged boot at the ball joint. Have the suspension inspected to confirm the cause.

    How is this control arm protected against rust?

    Dorman applies additional coatings to the assembly to help it resist rust and corrosion.

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