Dorman 540-066 Suspension Ball Joint - Front Upper

Dorman 540-066 Front Upper Ball Joint

Dorman 540-066 is a bolt-in suspension ball joint built as a direct replacement for the original equipment on select Cadillac, Chevrolet, and GMC trucks and SUVs. It is precision-engineered and tested for dependable fitment on front upper suspension applications, including 2014-2020 Chevrolet Silverado 1500 and 2017-2020 GMC Yukon models.

Key Features

• Steel construction with a grey finish
• Bolt-in, standard suspension grade replacement
• Greaseable design with grease fitting included
• Dust boot included for added joint protection
• Castle nut, cotter pin, cotter pin hole, and mounting hardware included
• Tapered stud design with 21 mm wrench size
• Direct OE-style replacement for front upper suspension service

Detailed Description

This Dorman suspension ball joint, part number 540-066, is made for front upper installation on specific Cadillac Escalade and Escalade ESV, Chevrolet Tahoe, Silverado 1500, Cheyenne, and GMC Yukon, Yukon XL, Sierra, and Sierra 1500 applications. It uses a bolt-in mounting type and a tapered stud for secure suspension connection, with a greaseable service design to support routine maintenance. The assembly includes a dust boot and is built from steel for replacement use in the front upper suspension.

This part cross-references MOOG Chassis Products K500340 for the same application.

What It Helps Fix

• Front-end clunking or looseness from a worn upper ball joint
• Uneven steering response caused by suspension joint wear
• Excess play in the front upper control arm connection
• Grease loss or contamination at the ball joint area
• Suspension service needs on high-mileage Cadillac, Chevrolet, and GMC vehicles

Installation Notes and Tips

Verify vehicle fitment by year, make, model, and front upper position before installation. This part is listed for 2014-2020 Cadillac Escalade, 2014-2020 Chevrolet Silverado 1500, and 2015-2020 GMC Yukon applications, with specific notes for stamped steel arms on certain model years. Use the included castle nut and cotter pin during installation, and torque fasteners to the vehicle manufacturer’s specifications. After installation, inspect alignment and suspension geometry.

Quality Assurance

Dorman states this ball joint is precision-engineered and rigorously tested to provide a reliable replacement for the original equipment on specific vehicles. The part number is 540-066.