GDP Bolt-On Traction Bars Kit (2001–2019 GM 2500HD/3500HD)

The GDP Bolt-On Traction Bars Kit is designed to control axle wrap and improve rear-end stability on 2001–2019 GM 2500HD and 3500HD trucks. Under heavy acceleration or towing loads, leaf spring suspension can allow the axle housing to rotate, causing wheel hop, reduced traction, and driveline stress. This system limits unwanted axle movement while maintaining normal suspension articulation.

This is a true bolt-on design that does not require welding or permanent chassis modification. The kit mounts directly to the frame and axle assembly using application-specific brackets.

What Traction Bars Address

• Axle wrap under acceleration
• Wheel hop during high torque launches
• Driveline vibration caused by axle rotation
• Inconsistent traction when towing or hauling

By stabilizing the rear axle, traction bars help maintain consistent tire contact and improve overall driveline control.

Available Variants

This listing includes multiple configurations to match axle diameter and vehicle generation:

🔹 75" Traction Bars – 3.5" Axle (2001–2010 GM 2500HD/3500HD)

• Designed for early Duramax platforms
• Compatible with 3.5" axle tubes

🔹 70" Traction Bars – 4.0" Axle (2011–2019 GM 2500HD/3500HD)

• Designed for later GM HD trucks
• Compatible with 4.0" axle tubes

🔹 Available Finishes for Color and Look

• Raw Steel
• Black (Powder Coated)

Construction & Design

• Heavy-duty steel bar construction
• Bolt-on frame and axle mounting brackets
• Application-specific length and axle diameter compatibility
• Designed for diesel torque loads

Installation Notes

1. Bolt-on installation
2. No welding required
3. Basic mechanical knowledge recommended
4. Verify axle tube diameter prior to ordering

Vehicle Fitment

2001–2010 GM Duramax LB7, LLY, LBZ, LMM 2500HD / 3500HD
(3.5" axle tube – 75" bar length)

2011–2019 GM Duramax LML, L5P 2500HD / 3500HD
(4.0" axle tube – 70" bar length)

Always confirm axle diameter before selecting your variant.

Why Axle Wrap Control Matters on Diesel Trucks

High-torque diesel engines can induce significant axle rotation under load. Without proper control, this can lead to:

• Premature U-joint wear
• Leaf spring fatigue
• Reduced traction consistency
• Increased drivetrain stress

A properly installed traction bar system helps maintain driveline geometry during torque events.