Help keep the front end steady and the ride composed with this Dorman control arm, part number 521-957, a front left lower arm that arrives with its ball joint and bushings already installed. It fits many vehicles, among them the 2009-2013 GMC Sierra 1500, 2007-2014 Chevrolet Tahoe and 2014 Chevrolet Suburban. See the Buyer's Guide tab for the full list and engine details.
This Dorman suspension control arm and ball joint assembly is built to directly replace the original part on the listed applications. As a Dorman lower control arm, it links the front left wheel to the chassis and lets the suspension move up and down, while the ball joint lets the steering knuckle pivot as you turn.
Signs a control arm or its ball joint may need replacing include clunking over bumps, loose or wandering steering, uneven tire wear and noticeable play in the ball joint. This listing is for one front left lower arm, and replacing both sides together is recommended.
Interchange: 820-17998B · 622.66080
82017998B · 62266080 · CA16333 · 10355407 · 25788110 · 25997507 · 25997509 · RK623833 · GS501003 · CMS501003 · 2607476 · 11CB50344 · 1503067
This part cross-references / interchanges with the following part numbers:
Is this an upper control arm for the 2009-2013 GMC Sierra 1500?
No. Dorman 521-957 is a front left lower control arm for the 2009-2013 GMC Sierra 1500. The upper arm is a separate part.
Does it fit the 2007-2014 Chevrolet Tahoe and the 2014 Chevrolet Suburban?
Yes, both are listed applications. Check the Buyer's Guide tab for the full list of vehicles and engine details.
What comes with this control arm?
The arm arrives with the ball joint and bushings pre-installed, which saves time and labor during the repair.
What does a lower control arm do?
It links the wheel to the chassis so the suspension can move up and down, and its ball joint lets the steering knuckle pivot as you steer.
What are signs this control arm may need replacing?
Clunking over bumps, loose or wandering steering, uneven tire wear or play in the ball joint can mean a worn arm. Have the suspension inspected to confirm the cause before replacing it.
WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
