MOOG RK621355 Front Right Lower Control Arm and Ball Joint Assembly

In this review the MOOG RK621355 front right lower suspension control arm and ball joint assembly is judged primarily on fit, durability and installation ease for heavy duty Chevy and GMC trucks. The reviewer finds it most appropriate for owners needing an OEM-level replacement on late model Silverado and Suburban 2500/3500 platforms and for technicians who want a part that aligns without added modification. The single biggest reason to buy is the precise engineering that yields a correct fit and straightforward installation, backed by corrosion protection and heat-processed strength.

Key Features

• Compatibility: Designed to fit a wide range of Chevrolet and GMC heavy duty and classic models so buyers can match the part to specific years and trims with confidence.
• Precision fit: Engineered with precision tolerances to enable easy installation and proper steering alignment right out of the box.
• Enhanced structural strength: Heat processed components match or exceed OE requirements to help resist premature failure under heavy loads.
• Corrosion protection: E-coated cast iron and coated studs reduce rust and road-grime related wear for longer service life in harsh conditions.
• Ball joint durability: Ball stud shape is optimized to compensate for sag and suspension loads, helping extend fatigue life.
• Comprehensive coverage: Available for many domestic and select foreign nameplates, making it useful for fleet and multi-vehicle shops.

Who It's For

This part suits owners of Chevrolet Silverado 1500 HD, 2500, 3500, Avalanche 2500 and Suburban 2500 models from the model years listed who need a direct-fit front right lower control arm with integrated ball joint. It is also a solid choice for mechanics and fleet repair shops that demand a replacement component with corrosion protection and engineered strength.

Those with vehicles outside the stated fitment years, or owners seeking an upgraded performance or adjustable aftermarket arm, should look elsewhere. Always verify vehicle year, make, model, engine and trim before ordering to ensure the confirmed fit notes apply to your truck.

Pros & Cons

Pros

• Excellent fit for the covered Chevrolet and GMC models, reducing alignment hassles after replacement.
• Durable construction with heat processing and coatings to resist rust and premature wear.
• Ball joint geometry designed to extend fatigue life and maintain suspension geometry under load.

Cons

• Durability feedback is mixed among users, so longevity can vary with driving conditions and maintenance.

Specifications

Brand	MOOG
Position	Front right lower control arm and ball joint assembly
Compatible vehicles	Select Chevrolet and GMC Silverado, Suburban, Avalanche models (see fitment)
Fitment years highlighted	1999-2013 depending on model and trim
Construction	Heat processed cast iron and steel with e-coating and coated studs
Designed benefit	Precision tolerances for easy installation and alignment

Our Verdict

The MOOG RK621355 is a practical, nearOE replacement for owners of the supported Chevrolet and GMC heavy duty trucks who want a control arm that fits correctly and includes corrosion protection and engineered strength. It represents good value for routine suspension repair, especially when correct fit and straightforward installation are the priority.

Frequently Asked Questions

Will this fit my Silverado?
Check your vehicle year, make, model, engine and trim against the confirmed fit notes before purchase to ensure compatibility.

Is installation difficult?
The part is made to precision tolerances to simplify installation and help achieve proper steering alignment without major modifications.

Does it resist rust?
Yes, the arm uses e-coated cast iron and coated studs to inhibit premature rust and wear in corrosive environments.