Fabtech Suspension Systems

2011–2019 GM 3500HD 2WD/4WD

Part #: K1123

Overview

The Fabtech 4" Basic Suspension System with Performance Shocks is designed to provide a durable and reliable lift upgrade for your GM 3500HD truck. Built with heavy-duty construction and engineered for strength, this suspension system enhances your vehicle's off-road capability while maintaining a factory-like appearance. Whether you're looking to improve ground clearance, support larger tires, or simply upgrade your truck's stance, this system offers a straightforward solution for enthusiasts and daily drivers alike.

Perfect for those who demand toughness and performance, this suspension kit is ideal for off-road adventures, towing, or enhancing the overall look of your truck. The system's design ensures a balanced ride quality, combining rugged durability with improved handling characteristics. With this upgrade, you'll get a more commanding presence on the road or trail, along with the confidence that comes from a proven suspension solution.

Key Features

This suspension system incorporates several innovative features to deliver superior performance and longevity:

• Heavy-duty 1/4-inch thick steel crossmember lower control arms provide maximum strength and durability for demanding off-road conditions.
• High arched design of the control arm crossmembers ensures increased ground clearance without sacrificing ride quality or handling.
• Retains near stock track width thanks to ductile iron steering knuckles, maintaining proper alignment and tire fitment within the fenders for a clean, factory-like appearance.
• Includes performance shocks designed to handle rough terrain and improve ride comfort, damping vibrations and reducing body roll.
• Rear lift is achieved with a reliable block and U-bolt configuration, providing a straightforward installation process and consistent height increase.
• Heavy-duty construction and design features ensure long-lasting performance, even under heavy loads or off-road conditions.
• Designed specifically for 2011–2019 GM 3500HD 2WD and 4WD models, ensuring a perfect fit and compatibility.
• Manufactured by Fabtech, a trusted name in off-road suspension systems, known for quality and innovation.

Construction & Design

The Fabtech 4" Basic Suspension System features robust construction with high-quality materials to withstand the rigors of off-road driving and heavy-duty use. The control arms are crafted from 1/4-inch thick steel, providing exceptional strength and resistance to bending or breaking under stress. The high arched design not only enhances ground clearance but also contributes to improved approach and departure angles, making it easier to navigate challenging terrain.

The ductile iron steering knuckles are engineered to maintain the factory track width, ensuring proper alignment and tire fitment, which helps preserve steering response and tire wear. The system's components are TIG-welded and precisely engineered to ensure a perfect fit, reducing installation time and ensuring consistent performance. The rear lift blocks and U-bolts are made from heavy-duty steel, providing reliable support and stability for towing or hauling heavy loads.

Performance & Sound

This suspension upgrade improves your vehicle's off-road capability by increasing ground clearance and providing a more aggressive stance. The performance shocks included are designed to absorb impacts from rough terrain, resulting in a smoother ride and better handling. While specific horsepower or torque gains are not claimed, users can expect improved stability, control, and ride quality both on and off the pavement.

Installation & Fitment

The Fabtech 4" Basic Suspension System is a bolt-on upgrade that requires no cutting or welding for installation. It uses existing factory mounting points and hardware, making the process straightforward for experienced DIY enthusiasts or professional installers. Basic mechanical skills and standard tools are sufficient to complete the installation, which typically takes a few hours. No additional tuning or alignment adjustments are usually necessary, but a professional alignment is recommended to ensure optimal handling and tire wear.

• Designed specifically for 2011–2019 GM 3500HD 2WD and 4WD models.
• Retains factory ride quality while providing increased ground clearance and off-road capability.
• Includes all necessary components for a complete installation, including control arms, shocks, blocks, and hardware.

What's Included

• Heavy-duty front control arms with high arched design
• Performance shocks for front and rear
• Rear lift blocks and U-bolts
• All necessary mounting hardware and instructions

Ideal For

• Off-road enthusiasts seeking increased ground clearance and durability
• Truck owners looking to improve appearance and stance
• Those needing a reliable suspension upgrade for towing or heavy loads
• Daily drivers wanting enhanced ride quality and handling

Emissions Note

This suspension system is designed for off-road use and may not be emissions compliant in all regions. Please verify local regulations before installation. This product is not CARB approved and is intended for off-road or recreational use only.