Dorman 540-089 Suspension Ball Joint - Front Lower

Dorman 540-089 Front Lower Ball Joint

Dorman 540-089 is a threaded suspension ball joint built as a direct replacement for the original equipment on select Chevrolet, GMC, Oldsmobile, and Isuzu applications. It is precision-engineered and tested for dependable front suspension service on vehicles such as the Chevrolet S10, GMC Sonoma, and Chevrolet Blazer.

Key Features

• Threaded, bolt-in suspension ball joint for front lower applications
• Steel construction with a gray finish
• Dust boot included to help protect the joint from contamination
• Castle nut included; cotter pin hole provided
• Premium suspension grade type
• Mounting hardware included; mounting hole quantity: 4
• Grease fitting not included; greaseable design not specified
• Wrench size: 12 mm; tapered stud type
• Part number: 540-089

Detailed Description

This Dorman suspension ball joint is designed for front lower use on a wide range of GM compact truck and SUV platforms, including the Chevrolet S10, GMC Jimmy, GMC Sonoma, and Chevrolet Blazer. The steel body, threaded mounting style, and tapered stud support OE-style suspension geometry where a worn lower ball joint can affect steering feel and tire wear. Dorman 540-089 also cross-references Monroe Shocks & Struts 172286 and 182286 for the same application.

Fitment coverage includes 1984-2004 Chevrolet S10, 1984-1994 Chevrolet S10 Blazer, 1995-2005 Chevrolet Blazer, 1984-1990 GMC S15, 1984-1991 GMC S15 Jimmy, 1995-2005 GMC Jimmy, 1991-2004 GMC Sonoma, 1991-1994 Oldsmobile Bravada, 1996-2001 Oldsmobile Bravada, and 1998-2000 Isuzu Hombre. If you are searching for a front lower ball joint for a Chevrolet S10 or GMC Sonoma, part number 540-089 is the relevant OE-style replacement to verify against your vehicle.

What It Helps Fix

• Front-end looseness or play from a worn lower ball joint
• Clunking or popping noises from the front suspension
• Uneven tire wear caused by suspension joint wear
• Steering wander or reduced directional stability
• Inspection failures related to excessive suspension movement

Installation Notes and Tips

Confirm the vehicle’s front lower application before ordering, since this part is specific to select years and models. The threaded, bolt-in design uses a tapered stud and cotter pin hole, so proper torque and fastener alignment are important during installation. Inspect the surrounding control arm and related suspension components for wear before completing the repair.

Quality Assurance

Dorman manufactures this ball joint as a precision-engineered replacement part and subjects it to rigorous testing for reliable service on the listed applications. The premium suspension grade construction and OE-style fitment focus support consistent replacement quality for compatible Chevrolet, GMC, Oldsmobile, and Isuzu front lower suspension repairs.