Dorman 520-129 Suspension Control Arm and Ball Joint Assembly - Front Left Upper

Durable Suspension Control Arm and Ball Joint Assembly

The Dorman 520-129 suspension control arm and ball joint assembly is engineered for reliable performance in light suspension applications. Designed specifically for select Cadillac, Chevrolet, and GMC trucks and SUVs, this assembly ensures proper steering and suspension function.

• Pre-greased for immediate installation and smooth operation
• Includes rubber bushings and mounting hardware for a complete replacement
• Steel construction with casting/forged control arm for strength and durability
• Bolt-in ball joint with threaded stud for secure mounting
• Compatible with multiple models including Chevrolet Silverado, GMC Yukon, Cadillac Escalade, and more

Product Features and Specifications

This suspension control arm and ball joint assembly (part number 520-129) features a black steel control arm with a maximum width of 288.5 mm and length of 237 mm. The assembly comes pre-greased and includes rubber bushings to reduce vibration and noise. The ball joint is installed and ready to bolt in, featuring a 14 mm threaded stud and a 12.3 mm mounting hole diameter. Mounting hardware is included to facilitate installation. This assembly is designed for light suspension grade applications and is not adjustable.

Compatible Vehicles and Applications

The Dorman 520-129 is compatible with a range of GM trucks and SUVs, including the Chevrolet C1500, C1500 Suburban, C2500, C2500 Suburban, Silverado, Tahoe, GMC Yukon, and the Cadillac Escalade. It also fits commercial models such as the Chevrolet Express 1500, Express 2500, Savana 1500, and Savana 2500. This ensures a precise fit and reliable suspension performance for 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 or excessive play in the front suspension
• Difficulty maintaining proper suspension geometry

Installation Notes and Tips

Installation of the Dorman 520-129 assembly requires basic suspension tools and mechanical knowledge. Since the ball joint is pre-installed and the control arm is pre-greased, the assembly can be bolted directly into place using the included mounting hardware. Ensure all mounting bolts are torqued to manufacturer specifications. It is recommended to have a professional alignment performed after installation to maintain proper handling and tire wear.

Quality Assurance and Warranty

Dorman suspension components are manufactured to meet or exceed OEM standards for fit, form, and function. The 520-129 control arm and ball joint assembly undergoes rigorous quality checks to ensure durability and performance. This product is backed by Dorman's limited warranty, providing coverage against defects in materials and workmanship under normal use.