Fabtech 4" Basic Suspension System with DLSS Reservoir Shocks

2011–2019 GM 2500HD 2WD/4WD

Part #: K1122DL

Overview

The Fabtech 4" Basic Suspension System with DLSS Reservoir Shocks is designed to provide a reliable and performance-oriented lift solution for your GM 2500HD pickup. Built with heavy-duty construction and proven engineering, this suspension upgrade enhances off-road capability, improves ground clearance, and maintains a factory-like ride quality. Whether you're looking to tackle rugged trails or improve your vehicle's stance and appearance, this system offers a balanced combination of durability and performance.

Ideal for truck enthusiasts and off-road adventurers, this suspension system helps support increased ground clearance and tire compatibility while preserving the vehicle's handling characteristics. The inclusion of DLSS reservoir shocks ensures superior damping performance, heat dissipation, and ride comfort, making it suitable for both daily driving and demanding off-road use.

Key Features

The Fabtech 4" Basic Suspension System is engineered with several key features that set it apart:

• Heavy-duty 1/4-inch thick steel crossmember construction provides maximum strength and durability for demanding off-road conditions.
• High arched lower control arm crossmembers maintain proper geometry and help retain the factory track width, ensuring tires stay under the fenders for a clean, OEM-like appearance.
• DLSS reservoir shocks deliver enhanced damping performance, improved heat dissipation, and a smoother ride over rough terrain.
• Rear lift achieved with a simple block and u-bolt configuration offers a straightforward installation process and consistent lift height.
• Designed specifically for 2011–2019 GM 2500HD 2WD/4WD models, ensuring a precise fit and optimal performance.
• Heavy-duty components and robust design make this system suitable for towing, hauling, and off-road adventures.
• Maintains factory ride quality while providing increased ground clearance and improved stance.
• Includes all necessary hardware and components for a complete installation.

Construction & Design

The Fabtech suspension system features high-quality materials and meticulous engineering to ensure long-lasting performance. The main crossmembers are constructed from 1/4-inch thick steel, offering exceptional strength and resistance to bending or cracking under heavy loads. The high arched design of the lower control arms helps preserve the factory track width, which is critical for maintaining proper handling and steering response.

The DLSS reservoir shocks are designed with a durable, corrosion-resistant body and a high-performance damping valving system. These shocks are engineered to provide consistent damping, reduce fade during extended off-road use, and improve overall ride comfort. The system's components are precision-fabricated and TIG-welded for superior strength and fitment, ensuring a seamless upgrade that enhances your vehicle's capabilities and appearance.

Performance & Sound

This suspension system improves your GM 2500HD's off-road performance by increasing ground clearance and providing better wheel travel. The DLSS reservoir shocks help deliver a controlled, comfortable ride even on rough terrain, while the increased ride height enhances approach and departure angles. The system does not significantly alter the vehicle's sound profile but offers a more commanding stance and improved handling characteristics.

Installation & Fitment

The Fabtech 4" Basic Suspension System is designed as a bolt-on upgrade, making installation straightforward for experienced DIY enthusiasts or professional installers. The system uses existing factory mounting points and requires no cutting or welding. Some minor adjustments may be necessary to ensure proper alignment, but no extensive modifications are typically needed. It is recommended to perform a wheel alignment after installation to optimize handling and tire wear.

• Installation typically requires standard hand tools and basic mechanical skills.
• No cutting, drilling, or tuning is required.
• Professional alignment is recommended to achieve optimal performance and tire longevity.

What's Included

• Front crossmembers and control arms
• DLSS reservoir shocks for front and rear
• Rear blocks and u-bolt hardware
• All necessary mounting hardware and brackets
• Installation instructions

Ideal For

This suspension system is perfect for GM 2500HD owners seeking to enhance their truck's off-road capability, appearance, and load-carrying capacity. Whether you're a weekend trail rider, a heavy-duty hauler, or a daily driver looking for a more aggressive stance, this system provides a reliable and durable upgrade.