Long Bed (3” Front / 5” Rear) Complete Lowering Kit – Control Arms + Hanger/Shackle + Shocks

Upgrade the stance, handling, and overall street presence of your heavy-duty GM truck with the 2001–2010 Chevy 2500HD / 3500HD Long Bed 3” Front / 5” Rear Complete Lowering Kit. Designed specifically for HD long-bed platforms, this professionally engineered suspension package delivers a bold, aggressive drop without sacrificing factory ride quality, alignment integrity, or long-term reliability.

If you don’t want your HD sitting flat on the ground—but still want a clean, performance-oriented stance that eliminates excessive wheel gap—this is the perfect solution. By combining Calmax front lowering control arms, a properly matched rear hanger and shackle system, and application-specific DJM shocks, this complete kit provides a balanced 3-inch front drop and 5-inch rear drop that looks right, rides right, and performs right.

Whether you’re building a daily-driven street truck, a show-quality cruiser, or a custom HD that still needs to work for a living, this kit delivers the geometry correction, durability, and ride comfort your Silverado or Sierra HD deserves.

Purpose-Built for Heavy-Duty GM Long Bed Trucks

Lowering a 2500HD or 3500HD long bed isn’t the same as lowering a half-ton truck. These HD platforms use torsion bars up front and heavy-duty leaf springs in the rear, meaning shortcuts—like cranked torsion keys or oversized lowering blocks—can quickly lead to harsh ride quality, alignment issues, poor handling, and premature suspension wear.

This kit is engineered specifically for the 2001–2010 Chevy Silverado and GMC Sierra 2500HD / 3500HD long bed chassis. Every component is designed to work together as a complete system, correcting suspension geometry while preserving factory-like ride comfort and drivability.

Front Drop: 3” Calmax Lowering Control Arms

The front of this kit uses Calmax 3-inch lowering control arms to achieve a true drop without compromising suspension travel or ride quality.

Instead of over-cranking torsion keys—which increases spring preload and creates a harsh, bouncy ride—Calmax control arms reposition the ball joint mounting point to lower the truck properly while retaining the factory torsion bar spring rate.

Benefits of Calmax Control Arms

• Direct bolt-on replacement for factory upper and lower control arms

• Achieves a true 3” front drop

• Retains factory torsion bars and spring rate

• Preserves near-stock ride comfort

• Corrects ball joint angles and suspension geometry

• Allows proper camber, caster, and toe alignment

• Improves suspension travel compared to torsion key drops

• Includes sport urethane bushings for improved handling and longevity

• Includes brand-new all-steel ball joints for maximum durability

This design ensures your HD truck sits lower without overstressing ball joints, bushings, CV shafts, or steering components, giving you long-term reliability and predictable handling.

Rear Drop: 5” Hanger & Shackle System

To match the aggressive front stance, the rear of the truck is lowered a full 5 inches using a traditional hanger and shackle lowering system.

Rather than stacking oversized blocks between the axle and leaf spring, this method relocates the front eye of the rear leaf spring upward on the frame using precision-engineered brackets. This keeps the suspension geometry correct and maintains strength, load capacity, and driveline alignment.

Rear System Benefits

• Achieves a true 5” rear drop

• Maintains proper pinion and driveline angles

• Preserves rear suspension travel

• Reduces axle wrap compared to block-only drops

• Retains towing and hauling capability (moderate loads)

• Heavy-duty welded steel construction

• Designed specifically for 2500HD / 3500HD long bed trucks

Important Fitment Check (Before Ordering)

To avoid installation surprises, we strongly recommend inspecting your factory rear leaf spring eye hangers before ordering.

All 2500HD / 3500HD long bed trucks we’ve seen use the correct factory hanger style required for this kit. However, GM made occasional production variations.

Quick Fitment Verification

1. Look at your factory front rear-leaf-spring eye hanger

2. Compare it to the reference image below

3. If it matches, you’re good to go

This simple step can save you from finding out you don’t have the right parts halfway through your install.

DJM Shocks Included – Complete Bolt-On System

Unlike many lowering kits that leave shock selection up to the buyer, this is a true complete lowering kit that includes properly valved DJM shocks matched to the new ride height and suspension travel.

Included DJM Shocks

• Front shocks: #1415

• Rear driver-side shock: #2200

• Rear passenger-side shock: #2400

These shocks are engineered to provide:

• Smooth, controlled ride quality

• Proper compression and rebound damping

• Reduced body roll and axle hop

• Correct shock stroke for the lowered ride height

• Long-term durability and reliability

Why Choose This 3” / 5” Long Bed HD Lowering Kit?

1. Aggressive Yet Functional Stance

The 3” front / 5” rear drop gives your HD truck a leveled, performance-oriented look without scraping everywhere you go. It dramatically improves wheel gap and stance while remaining fully street-drivable.

2. Factory-Like Ride Quality

By retaining factory torsion bar spring rates and using engineered geometry correction, this kit preserves a smooth, controlled ride—unlike cheap drop solutions that ride harsh and wear out components.

3. Correct Suspension Geometry

Calmax control arms restore proper ball joint and alignment angles, ensuring predictable handling and long-term reliability.

4. Complete System – No Guesswork

With control arms, hanger/shackle brackets, and matched DJM shocks included, this kit eliminates compatibility issues and saves time and money.

5. Heavy-Duty Strength

Every component is built to handle the weight, torque, and real-world demands of a 2500HD or 3500HD long bed platform.

Vehicle Fitment

Fits:

• 2001–2010 Chevy Silverado 2500HD Long Bed

• 2001–2010 GMC Sierra 2500HD Long Bed

• 2001–2010 Chevy Silverado 3500HD Long Bed

• 2001–2010 GMC Sierra 3500HD Long Bed

Drivetrain Compatibility:

• 2WD

• 4WD

Installation Overview

This kit is designed for bolt-on installation using factory mounting points.

Front Installation

• Remove factory control arms

• Install Calmax control arms

• Reuse factory torsion bars

• Install front shocks

• Perform wheel alignment

Rear Installation

• Support rear axle

• Remove factory leaf spring hangers

• Install new hanger brackets

• Install rear shackles

• Reposition leaf springs

• Install rear shocks

• Check pinion angle

Professional installation is recommended, especially for rear hanger replacement, which may require drilling or rivet removal depending on factory configuration.

Alignment, Wheels & Tire Fitment

After installation, a professional alignment is required. The Calmax control arms are engineered to allow proper camber, caster, and toe adjustment at the new ride height.

Typical Wheel & Tire Fitment

• 20”–24” wheels commonly fit well

• Performance or street-oriented tire profiles recommended

• Final fitment depends on wheel width, offset, and tire size

Ideal Applications

• Daily-driven street trucks

• Custom show builds

• Performance-oriented HD builds

• Light towing and hauling

• Owners who want stance without sacrificing drivability

Lower Your HD the Right Way

The 2001–2010 Chevy 2500HD / 3500HD Long Bed 3” Front / 5” Rear Complete Lowering Kit delivers the perfect balance of stance, comfort, durability, and geometry correction.

With Calmax lowering control arms, a proven rear hanger/shackle system, and matched DJM shocks included, this kit represents one of the most refined lowering solutions available for heavy-duty GM long bed trucks.

If you’re serious about lowering your HD the right way—without compromising safety, comfort, or component life—this complete lowering kit is the smart, proven choice.