Dorman 521-957 Suspension Control Arm and Ball Joint Assembly - Front Left Lower

Durable Suspension Control Arm and Ball Joint Assembly

The Dorman 521-957 suspension control arm and ball joint assembly is engineered for reliable performance in select Cadillac, Chevrolet, and GMC trucks and SUVs. Designed to meet regular suspension grade requirements, this assembly offers a pre-greased, ready-to-install solution for vehicles like the Chevrolet Silverado 1500 and GMC Sierra 1500.

• Pre-greased control arm and ball joint for immediate use
• Includes rubber bushings and mounting hardware for complete installation
• Aluminum control arm with casting/forged construction for strength and reduced weight
• Press-in ball joint with threaded stud for secure mounting
• Compatible with multiple models including Cadillac Escalade, Chevrolet Tahoe, and GMC Yukon XL 1500

Technical Specifications and Features

This suspension control arm assembly features a black aluminum control arm measuring up to 288.5 mm in width and 237 mm in length. The assembly includes a press-in ball joint with a 14 mm threaded stud and a 12.3 mm mounting hole diameter. Rubber bushings are integrated to absorb vibrations and provide smooth suspension articulation. The part comes pre-greased, eliminating the need for additional lubrication during installation. Mounting hardware is included to facilitate a straightforward replacement process.

Compatible Vehicles and Applications

The Dorman 521-957 is compatible with a range of full-size trucks and SUVs, including:

• Cadillac Escalade, Escalade ESV, and Escalade EXT
• Chevrolet Avalanche, Cheyenne, Silverado 1500, Suburban 1500, and Tahoe
• GMC Sierra, Sierra 1500, Yukon, and Yukon XL 1500

This part is designed for light suspension grade use and is not adjustable, making it suitable for standard suspension setups on these vehicles.

Common Suspension Issues Addressed

• Worn or damaged control arm bushings causing steering instability
• Ball joint wear leading to uneven tire wear or clunking noises
• Corroded or bent control arms affecting wheel alignment
• Vibration and poor handling due to compromised suspension components
• Failed suspension parts impacting vehicle safety and ride quality

Installation Notes and Tips

Installation of the Dorman 521-957 control arm and ball joint assembly requires basic suspension knowledge and tools. Since the ball joint is press-in type with a threaded stud, proper tools for pressing and torqueing are recommended. The assembly comes pre-greased and includes mounting hardware, simplifying the replacement process. Ensure the vehicle is securely lifted and supported before beginning work. Alignment should be checked and adjusted after installation to maintain proper handling characteristics.

Quality Assurance and Warranty

Dorman suspension components are manufactured to meet or exceed OEM specifications. The 521-957 control arm and ball joint assembly undergoes rigorous quality control to ensure durability and fitment accuracy. This part is backed by Dorman's limited warranty, providing coverage against defects in materials and workmanship under normal use.