Fabtech Suspension Systems

2011–2019 GM 3500HD 2WD/4WD

Part #: K1124DL

Overview

The Fabtech 4" Basic Suspension System with DLSS Reservoir Shocks is designed to provide a robust and reliable lift upgrade for your GM 3500HD truck. Whether you're looking to enhance off-road capability, improve ground clearance, or achieve a more commanding stance, this suspension system offers a proven solution built with heavy-duty construction and thoughtful design features. Ideal for truck enthusiasts who demand durability and performance, this system ensures your vehicle can handle challenging terrains while maintaining a clean, factory-like appearance on the street.

With this suspension upgrade, you'll experience improved ride quality, increased wheel travel, and the ability to fit larger tires. The system is engineered to support your vehicle's weight and towing capacity, making it suitable for both daily driving and off-road adventures. Designed for trucks from 2011 to 2019 GM 3500HD models, this kit seamlessly integrates with your existing chassis, providing a straightforward installation process without sacrificing reliability or safety.

Key Features

Fabtech's 4-inch crossmember system features high arched lower control arm crossmembers constructed from 1/4-inch thick steel, ensuring maximum strength and durability for demanding applications. The heavy-duty steel construction helps support increased loads and off-road impacts, giving you confidence in your vehicle's suspension performance. The ductile iron steering knuckles are designed to retain the near stock track width, maintaining proper alignment and ensuring that tires stay under the fenders for a clean, OEM-like appearance.

• Heavy-duty 1/4-inch thick steel crossmembers for maximum strength and longevity
• High arched design provides increased ground clearance and approach angles
• Retains factory track width with ductile iron steering knuckles for proper alignment and appearance
• Rear lift achieved with a block and U-bolt configuration for simple, effective height increase
• Includes Fabtech's proven DLSS Reservoir Shocks for enhanced damping and ride quality
• Designed specifically for GM 3500HD 2WD and 4WD models from 2011 to 2019
• Heavy-duty construction ensures durability for off-road and towing applications
• Maintains factory ride comfort while providing increased suspension travel
• Easy bolt-on installation with minimal modifications required

Construction & Design

This suspension system is built with heavy-duty steel components, including 1/4-inch thick crossmembers that provide exceptional strength and resistance to bending or cracking under load. The high arched design not only enhances ground clearance but also improves approach and departure angles, making it well-suited for off-road driving. The ductile iron steering knuckles are engineered to retain the factory track width, ensuring proper alignment and tire fitment, which helps maintain the vehicle's handling characteristics and appearance.

The rear lift is accomplished with a simple block and U-bolt setup, allowing for a straightforward installation process that does not require extensive modifications. The inclusion of Fabtech's DLSS Reservoir Shocks offers superior damping performance, providing a smoother ride over rough terrain and better control during off-road excursions. Overall, the system combines rugged construction with thoughtful design to deliver a reliable, long-lasting suspension upgrade.

Performance & Sound

This suspension system enhances your vehicle's off-road capability by increasing ground clearance and improving suspension travel. The heavy-duty shocks and reinforced components help support increased loads and rough terrain, providing a confident driving experience. While specific horsepower or torque gains are not applicable, the upgraded suspension contributes to improved handling, stability, and ride quality both on and off the pavement.

Installation & Fitment

The Fabtech 4" Basic Suspension System is designed as a bolt-on upgrade, making installation straightforward for those with basic mechanical skills. The kit utilizes factory mounting points and requires no cutting or drilling in most cases. The included components are engineered to fit seamlessly with your GM 3500HD chassis, ensuring proper alignment and performance. Some minor adjustments may be necessary, but overall, the installation process is simplified to minimize downtime.

• Bolt-on installation with standard hand tools
• No cutting, drilling, or extensive modifications required in most applications
• Designed for easy integration with factory components and mounting points
• Complete instructions included for a hassle-free upgrade

What's Included

• Front crossmembers with high arched control arms
• Heavy-duty ductile iron steering knuckles
• DLSS Reservoir Shocks for front and rear
• Rear blocks and U-bolts for lift
• All necessary hardware and mounting brackets
• Installation instructions

Ideal For

This suspension system is perfect for truck owners seeking a durable lift solution that enhances off-road performance, ground clearance, and overall appearance. It is well-suited for towing, hauling, and off-road adventures, providing a reliable upgrade for daily drivers and weekend warriors alike. If you want a robust, heavy-duty suspension that maintains factory alignment and appearance while offering increased capability, this kit is an excellent choice.

Emissions Note

This product is designed to meet or exceed industry standards for durability and performance. Please verify local regulations regarding emissions compliance if applicable. The kit is intended for off-road use and may not be legal for street use in all areas.