Fabtech Ultimate Suspension System

2011–2019 GM C/K2500HD / 3500HD 6-Lug 4WD / 2WD with 3.5-inch Lift

Part #: K1055

Overview

The Fabtech 3.5-inch Ultimate Suspension System is designed to enhance the off-road capability and appearance of your GM C/K2500HD or 3500HD pickup truck. Engineered for enthusiasts who want a balanced combination of performance, durability, and street-friendly ride quality, this system provides a moderate lift that allows for larger tires and improved ground clearance. Whether you're tackling rugged trails or cruising on the highway, this suspension upgrade offers a reliable solution to elevate your truck's stance and capability.

Built with precision and quality, the Fabtech Ultimate System ensures your vehicle maintains factory-like handling and ride comfort while gaining additional height and off-road prowess. It's ideal for those seeking a versatile lift that supports 33-inch or 35-inch tall tires with minimal modifications, making it suitable for both daily driving and off-road adventures.

Key Features

The Fabtech Ultimate Suspension System incorporates innovative design elements and high-quality materials to deliver exceptional performance and durability. Key features include:

• Replacement upper control arms constructed from 1.50-inch OD .120-inch thick wall DOM tubing, providing increased strength and longevity for off-road use.
• Heavy-duty Fabtech ductile iron steering knuckles that enhance steering response and durability under demanding conditions.
• Retains factory torsion bars in their original position, preserving factory ride quality and handling characteristics.
• Forged adjusting keys allow precise tuning of the lift height, ensuring proper alignment and suspension geometry.
• Designed to provide approximately 3.5 inches of lift, offering increased ground clearance and a commanding stance.
• Utilizes high-quality components and manufacturing processes to withstand off-road impacts and harsh environments.
• Compatible with a wide range of tire sizes, supporting 33-inch and 35-inch tires with minimal trimming required.
• Optimized for street and off-road use, delivering a balanced ride that performs well on pavement and trail.
• Backed by Fabtech's reputation for quality and innovation in suspension systems.

Construction & Design

This suspension system features replacement upper control arms made from durable DOM (Drawn Over Mandrel) tubing, which offers superior strength and resistance to bending and fatigue. The control arms are engineered to improve suspension geometry and reduce bump steer, resulting in more precise steering response. The heavy-duty ductile iron steering knuckles are designed to withstand the rigors of off-road driving while maintaining proper alignment angles.

The system's components are crafted with TIG welding and CAD-designed precision, ensuring a perfect fit and long-lasting performance. The use of high-quality materials and manufacturing techniques guarantees that your lifted truck will handle demanding terrains and heavy loads with confidence. The design maintains the factory torsion bar mounting points, simplifying installation and preserving factory handling characteristics.

Performance & Sound

With this system installed, you'll notice improved ground clearance, allowing you to navigate rough terrain more confidently. The lift enhances the truck's overall stance, giving it a more aggressive and commanding appearance. The suspension's design helps support larger tires, which can improve traction and off-road capability. While primarily focused on performance and durability, the system also maintains a comfortable ride on paved roads, making it suitable for daily driving as well as off-road adventures.

Installation & Fitment

The Fabtech 3.5-inch Ultimate Suspension System is a bolt-on upgrade that requires no cutting or welding for installation. The system uses factory mounting points and includes all necessary hardware and components for a straightforward installation process. Some minor alignment adjustments may be required after installation to ensure optimal handling and tire wear. No special tuning or modifications are necessary, making it a convenient upgrade for your truck.

• Designed specifically for 2011–2019 GM C/K2500HD and 3500HD trucks with 6-lug wheels.
• Compatible with both 2WD and 4WD configurations.
• Supports 33-inch or 35-inch tires with minimal trimming needed.

What's Included

• Replacement upper control arms
• Heavy-duty ductile iron steering knuckles
• Forged adjusting keys
• All necessary mounting hardware and brackets
• Installation instructions and technical support

Ideal For

• Off-road enthusiasts seeking a reliable lift for rugged terrain
• Truck owners wanting a balanced combination of performance and streetability
• Those looking to run larger tires for improved ground clearance and appearance
• Daily drivers who want a durable, high-quality suspension upgrade

Emissions Note

This suspension system is designed to be compliant with all applicable emissions regulations and is suitable for use in states with strict emissions standards. Always verify local regulations before installation.