Dorman 521-887 Suspension Trailing Arm - Rear Upper

Overview of Dorman Suspension Trailing Arm 521-887

The Dorman Suspension Trailing Arm 521-887 is engineered for reliable suspension performance on select Buick, Chevrolet, GMC, Isuzu, Oldsmobile, and Saab models. Designed with durable steel construction and coated finish, this trailing arm supports vehicle stability and handling for models like the Chevrolet Trailblazer and GMC Envoy.

• Constructed from high-strength steel with a coated finish for corrosion resistance
• Includes black rubber bushings for vibration dampening and noise reduction
• Length of 262.5 mm to match OEM specifications
• Press-in type end 2 for secure attachment
• Welded attachment type for structural integrity
• Compatible with Buick, Chevrolet, GMC, Isuzu, Oldsmobile, and Saab SUVs and trucks
• Part number 521-887 ensures exact fit for specified models

Detailed Product Description

This Dorman suspension trailing arm 521-887 is designed to replace the original trailing arm on vehicles such as the Chevrolet Trailblazer, GMC Envoy, and Buick Rainier. Made from durable steel with a protective coated finish, it resists rust and wear over time. The black rubber bushings included help absorb road vibrations and reduce noise, contributing to a smoother ride. The trailing arm measures 262.5 mm in length and features a press-in end type for proper fitment. Its welded attachment type ensures a strong connection to the vehicle’s suspension system. This part is not adjustable and does not include ball joints or mounting hardware, so existing hardware should be reused or replaced separately as needed.

Common Applications and Issues Addressed

• Restores proper suspension alignment and geometry
• Eliminates clunking or knocking noises from worn trailing arms
• Improves vehicle handling and stability on Buick, Chevrolet, and GMC SUVs
• Replaces damaged or corroded trailing arms to maintain safety
• Addresses excessive vibration or uneven tire wear caused by faulty suspension components

Installation Notes and Tips

• Verify compatibility with your specific make and model before installation
• Use appropriate tools to press in bushings securely
• Inspect and replace mounting hardware if worn or damaged, as it is not included
• Ensure proper torque specifications are followed during installation
• Professional installation is recommended for suspension components

Quality Assurance and Warranty

Dorman suspension parts are manufactured to meet or exceed OEM standards for fit, form, and function. The 521-887 trailing arm undergoes rigorous quality control to ensure durability and performance. While specific warranty details may vary, Dorman typically offers limited warranties covering defects in material and workmanship. Consult product documentation or the supplier for exact warranty terms.