Dorman 520-137 Suspension Control Arm and Ball Joint Assembly - Front Left Upper

Durable Suspension Control Arm and Ball Joint Assembly

The Dorman 520-137 suspension control arm and ball joint assembly is engineered for reliable performance in light suspension applications. Designed to fit a range of GM and related vehicles, this assembly offers a pre-greased, bolt-in solution for restoring proper suspension function.

• Pre-greased control arm and ball joint for immediate use
• Includes rubber bushings and mounting hardware for complete installation
• Steel construction with casting/forged control arm for strength and durability
• Bolt-in ball joint with threaded stud for secure mounting
• Compatible with Buick, Chevrolet, GMC, Isuzu, Oldsmobile, and Pontiac models

Product Features and Specifications

This suspension control arm and ball joint assembly from Dorman is designed with a steel control arm measuring up to 288.5 mm in width and 237 mm in length. The assembly includes rubber bushings to absorb road vibrations and reduce noise. The ball joint is pre-installed and features a threaded stud with a 14 mm thread diameter, secured by a single 12.3 mm mounting hole. The assembly is pre-greased, eliminating the need for additional lubrication during installation. Mounting hardware is included to facilitate a straightforward replacement process. This part is intended for light suspension grade applications and is not adjustable.

Compatible Vehicles and Applications

The Dorman 520-137 control arm and ball joint assembly is compatible with various models including the Chevrolet Blazer, S10, S10 Blazer, S15, S15 Jimmy, Sonoma, and El Camino. It also fits Buick models such as the Regal and Century, Pontiac Grand Prix and Firebird, Oldsmobile Cutlass and Cutlass Supreme, GMC Jimmy and Sierra, and Isuzu Hombre. This part is ideal for restoring suspension performance and handling characteristics on these vehicles.

Common Suspension Issues Addressed

• Worn or damaged control arm bushings causing steering instability
• Loose or failing ball joints leading to uneven tire wear
• Excessive suspension noise or vibration
• Misalignment issues affecting vehicle handling
• Corroded or weakened control arm components

Installation Notes and Tips

Installation of the Dorman 520-137 assembly requires basic suspension knowledge and tools. Since the ball joint is pre-installed and the control arm is pre-greased, the process is simplified. Ensure the vehicle is securely lifted and supported before removal of the old control arm. Use the included mounting hardware and torque all fasteners to manufacturer specifications. Alignment should be checked and adjusted 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 520-137 assembly undergoes rigorous quality control to ensure durability and performance. This part comes with a limited warranty covering defects in materials and workmanship, providing confidence in your suspension repair.