Moog RK663838 Suspension Control Arm - Rear Upper

Moog RK663838 Rear Upper Control Arm

The Moog RK663838 is a premium rear upper suspension control arm built for foreign and domestic nameplates. It is engineered for structural strength and corrosion protection, making it a direct replacement choice for rear suspension service on select Cadillac, Chevrolet, Buick, and GMC models.

Key Features

• Premium-grade suspension control arm for rear upper applications
• Engineered for structural strength
• Built with corrosion protection in mind
• Direct-fit replacement for select GM crossover and SUV platforms
• Cross-references Mevotech Supreme CMS501316 for the same application

Detailed Description

Moog RK663838 is a rear upper suspension control arm for vehicles including the Cadillac XT5, Cadillac XT6, Chevrolet Blazer, Buick Enclave, Chevrolet Traverse, Chevrolet Traverse Limited, and GMC Acadia. This premium control arm is intended for rear suspension repair where a worn or damaged upper arm can affect alignment stability, ride quality, and rear-end handling. The RK663838 part number is also referenced in OE-style replacement searches for these applications.

Compatible With 2017-2025 Cadillac XT5, rear upper; 2020-2025 Cadillac XT6, rear upper; 2019-2025 Chevrolet Blazer, rear upper; 2018-2024 Buick Enclave, rear upper; 2024 Chevrolet Traverse Limited, rear upper; 2018-2023 Chevrolet Traverse, rear upper; and 2017-2023 GMC Acadia, rear upper. The Moog RK663838 is a practical match for shoppers searching for a rear upper control arm for Cadillac XT5, Chevrolet Traverse, or GMC Acadia suspension repair.

Common Repair Uses

• Rear suspension noise from a worn upper control arm
• Uneven rear tire wear related to suspension looseness
• Loose or unstable rear-end handling
• Alignment issues after control arm wear
• Replacement of a corroded or damaged rear upper arm

Installation Notes and Tips

Verify vehicle year, make, model, and rear upper position before ordering. Compare the original arm and mounting points to confirm correct application on the Cadillac XT5, Chevrolet Traverse, or GMC Acadia platform. After installation, a wheel alignment is recommended to restore suspension geometry and tire wear characteristics.

Quality Assurance

Moog positions this control arm as a premium replacement part with structural-strength and corrosion-protection engineering for long-term service in suspension repair.