Delphi TC7427 Suspension Control Arm and Ball Joint Assembly - Front Left Lower

Delphi Suspension Control Arm and Ball Joint Assembly Overview

The Delphi TC7427 suspension control arm and ball joint assembly is designed for front left lower suspension applications on Chevrolet and GMC heavy-duty trucks. Engineered with durable steel construction and pre-greased components, this assembly provides reliable medium-grade suspension performance for Sierra 2500 HD, Sierra 3500 HD, Silverado 2500 HD, and Silverado 3500 HD models.

• Pre-greased for immediate use without additional lubrication
• Includes rubber bushings for vibration dampening and noise reduction
• Steel control arm constructed with casting and forging for strength
• Press-in ball joint with threaded stud for secure mounting
• Designed specifically for front left lower suspension position
• Mounting hardware included for straightforward installation
• Standard replacement grade suitable for medium suspension demands

Durable Construction and Design Features

The TC7427 control arm assembly features a robust steel control arm built through casting and forging processes, ensuring structural integrity under heavy loads. The black finish offers corrosion resistance to extend service life. Rubber bushings are integrated to absorb road shocks and reduce noise, enhancing ride comfort. The ball joint is press-in mounted with a threaded stud measuring 0.63 inches in diameter and 1.378 inches in length, providing a secure and precise fit. This assembly is pre-greased, eliminating the need for immediate maintenance after installation.

Compatible Vehicles and Applications

This suspension control arm and ball joint assembly is compatible with the following vehicles:

• Chevrolet Sierra 2500 HD (front left lower position)
• Chevrolet Sierra 3500 HD (front left lower position)
• GMC Sierra 2500 HD (front left lower position)
• GMC Sierra 3500 HD (front left lower position)
• Chevrolet Silverado 2500 HD (front left lower position)
• Chevrolet Silverado 3500 HD (front left lower position)
• GMC Silverado 2500 HD (front left lower position)
• GMC Silverado 3500 HD (front left lower position)

Common Suspension Issues Addressed

• Worn or damaged control arm bushings causing excessive play or noise
• Ball joint wear leading to steering instability or uneven tire wear
• Corroded or weakened control arm compromising suspension alignment
• Vibration and harshness from deteriorated suspension components
• Failed suspension parts affecting vehicle handling and safety

Installation Notes and Tips

Installation of the Delphi TC7427 control arm assembly requires removal of the existing front left lower control arm. Since the ball joint is press-in mounted with a threaded stud, proper tools are necessary to press out the old ball joint and press in the new one if replacement is needed separately. This assembly comes pre-greased and includes rubber bushings and mounting hardware, simplifying the installation process. Ensure all mounting bolts are torqued to manufacturer specifications to maintain suspension integrity.

Quality Assurance and Warranty

The Delphi TC7427 suspension control arm and ball joint assembly meets standard replacement grade requirements for medium suspension applications. Manufactured with quality steel and durable rubber bushings, it is designed to provide consistent performance and durability. Delphi products typically come with a limited warranty covering defects in materials and workmanship; please refer to Delphi's official warranty documentation for specific terms.