Moog RK620310 Suspension Control Arm and Ball Joint Assembly - Front Left Lower

OE-Style Front Left Lower Control Arm

Moog RK620310 is a suspension control arm and ball joint assembly for the front left lower position on select Chevrolet, GMC, Isuzu, and Oldsmobile SUVs. It is built with stamped steel construction, pre-greased components, and included bushings for direct OE-style service on Trailblazer, Envoy, Ascender, and Bravada applications.

Key Features

• Stamped steel control arm with black corrosion-resistant finish
• Pre-greased assembly for ready-to-install service
• Ball joint uses a bolt-in mounting type with threaded stud design
• Rubber bushings included for suspension isolation
• Mounting hardware included
• Non-adjustable OE replacement design
• Fits front left lower suspension positions only

Fitment and Application Details

Compatible With 2002-2003 Chevrolet Trailblazer, front left lower; 2002-2003 Chevrolet Trailblazer EXT, front left lower; 2002-2003 GMC Envoy, front left lower; 2002-2003 GMC Envoy XL, front left lower; 2003 Isuzu Ascender, front left lower; and 2002-2003 Oldsmobile Bravada, front left lower. This part cross-references Mevotech Supreme CMS50154 and Dorman OE Solutions 521-389 for the same application. Part number RK620310 is also used in OE replacement searches for these front left lower SUV suspension applications.

What This Part Helps Address

• Excessive play in the front left lower suspension arm
• Worn or noisy ball joint movement
• Cracked or deteriorated rubber bushings
• Uneven steering response from a worn control arm assembly
• Corrosion-related replacement needs on the lower front suspension

Installation Notes and Tips

Verify the vehicle’s front left lower suspension configuration before ordering, including the 12mm stabilizer bar link stud diameter noted in the fitment data. Inspect adjacent suspension components, alignment angles, and fasteners during replacement. Because this assembly includes a bolt-in ball joint and mounting hardware, installation should follow the vehicle service procedure and be completed with a post-install alignment.

Quality Assurance

Moog premium control arms are engineered for structural strength and corrosion protection on foreign and domestic nameplates. RK620310 is built as an OE-style replacement assembly for consistent fitment and serviceability on the listed Chevrolet, GMC, Isuzu, and Oldsmobile applications.