Dorman 520-139 Suspension Control Arm and Ball Joint Assembly - Front Left Upper

Durable Suspension Control Arm and Ball Joint Assembly

The Dorman 520-139 suspension control arm and ball joint assembly is engineered for reliable performance in Chevrolet, GMC, Isuzu, and Oldsmobile trucks and SUVs. Designed to meet regular suspension grade requirements, this assembly ensures proper steering and suspension function for models like the Chevrolet Blazer and GMC Jimmy.

• 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 fitment
• Compatible with Chevrolet S10, GMC Sonoma, Isuzu Hombre, and related models

Product Features and Specifications

This suspension control arm and ball joint assembly (part number 520-139) features a black steel control arm with a maximum width of 288.5 mm and length of 237 mm. The assembly includes a pre-installed ball joint with a 14 mm threaded stud and a single 12.3 mm mounting hole. Rubber bushings are included to reduce vibration and noise, while the bolt-in ball joint mounting type allows for straightforward installation. The assembly is designed for light suspension grade use, suitable for regular driving conditions.

Compatible Vehicles and Applications

This Dorman control arm and ball joint assembly is compatible with a range of Chevrolet, GMC, Isuzu, and Oldsmobile vehicles, including:

• Chevrolet Blazer, S10, S10 Blazer, S15, S15 Jimmy
• GMC Jimmy, Sonoma
• Isuzu Hombre, Bravada
• Oldsmobile Bravada

Ensure proper fitment by verifying your vehicle model and year before installation.

Common Suspension Issues Addressed

• Worn or damaged control arm bushings causing steering instability
• Ball joint wear leading to uneven tire wear or clunking noises
• Loose or broken mounting hardware affecting suspension alignment
• Vibration and noise from deteriorated suspension components
• Reduced handling performance due to compromised control arm integrity

Installation Notes and Tips

The Dorman 520-139 assembly comes pre-greased and includes all necessary mounting hardware, simplifying the replacement process. The bolt-in ball joint design with a threaded stud allows for secure attachment without additional modifications. It is recommended to inspect related suspension components during installation and perform a wheel alignment afterward to ensure optimal vehicle handling.

Quality Assurance and Warranty

Dorman suspension components are manufactured to meet or exceed OEM standards for durability and fitment. This control arm and ball joint assembly undergoes rigorous quality checks to ensure reliable performance. While specific warranty details may vary, Dorman typically offers a limited warranty covering defects in materials and workmanship.