Moog RK621783 Suspension Control Arm and Ball Joint Assembly - Front Upper

Reliable Suspension Control Arm and Ball Joint Assembly

The Moog RK621783 suspension control arm and ball joint assembly is engineered for durability and precise fitment. Designed specifically for Chevrolet, GMC, and Hummer heavy-duty trucks and SUVs, this pre-greased control arm ensures smooth suspension performance and improved vehicle handling.

• Pre-greased for immediate installation and reduced maintenance
• Includes rubber bushings and mounting hardware for a complete replacement
• Stamped steel control arm construction with black finish for strength and corrosion resistance
• Adjustable design with threaded ball joint stud and press-in mounting type
• Compatible with Chevrolet Avalanche 2500, GMC Sierra 1500 HD, Hummer H2, and other 2500/3500 series models

Durable Construction and Precise Fitment

This Moog suspension control arm assembly features a stamped steel arm with a black finish that resists corrosion and wear. The included rubber bushings help absorb road vibrations, while the pre-greased ball joint with a threaded stud and press-in mounting type ensures a secure and reliable connection. The adjustable control arm design allows for fine-tuning suspension alignment, maintaining optimal handling characteristics for your Chevrolet Silverado 2500 HD, GMC Sierra 3500, or Hummer H2. The assembly comes complete with all necessary mounting hardware for a straightforward installation.

Compatible Vehicles and Applications

This control arm and ball joint assembly is compatible with a range of Chevrolet, GMC, and Hummer models, including:

• Chevrolet Avalanche 2500
• GMC Sierra 1500 HD, 2500, 3500, and their Classic and HD variants
• Chevrolet Silverado 1500 HD, 2500, 3500, and Classic models
• GMC Yukon XL 2500 and Suburban 2500
• Hummer H2

Common Suspension Issues Addressed

• Worn or damaged control arm bushings causing poor handling
• Loose or failing ball joints leading to steering instability
• Corroded or bent control arms affecting suspension geometry
• Excessive vibration or noise from suspension components
• Misalignment issues requiring adjustable control arm replacement

Installation Notes and Tips

• Pre-greased ball joint eliminates the need for immediate lubrication
• Ensure proper torque specifications are followed for mounting hardware
• Adjust control arm length as needed to maintain correct alignment
• Inspect related suspension components during installation for wear
• Professional alignment is recommended after installation

Quality Assurance and Warranty

Moog suspension components are manufactured to meet or exceed OEM standards, providing reliable performance and durability. The RK621783 control arm and ball joint assembly includes all necessary hardware and bushings for a complete replacement. While specific warranty details vary, Moog typically offers a limited warranty covering defects in materials and workmanship to ensure customer confidence in their suspension parts.