Fits: 2001 thru 2010 Chevy Silverado/GMC Sierra 2500HD/3500HD LB7/LLY/LBZ/LMM Duramax Diesel

Kit includes an easy to install Roadactive Suspension Heavy Duty Spring for each rear leaf spring. Roadmaster Active Suspension kits are designed to strengthen the rear leaf springs for towing or hauling without negatively affecting unloaded ride quality. This kit will reduce rear bounce and squat when loaded while significantly improving stability, handling and performance at all times. 
Roadmaster Active Suspension kit comes fully assembled out of the box and ready for installation. Follow your application guide that is in the box and you will be ready to test your Roadmaster Active Suspension after installation!
Heavy Duty - Best for trucks that experience squat of +2-3 inches when loaded, and/or trailer applies tongue weight of 600lbs or more.
 

Features: 

• Increase rear suspension strength up to 50%
• Reduce rear squat & bounce and improve road handling and stability 
• Strengthen the rear leaf springs for towing or hauling
• Maintain ride comfort when driving unloaded
• Acts as a 3-in-1 solution operating like a helper spring, sway bar, and traction bar
• Reduce axle wrap
• Make towing safer 
• Fit-and-forget, no readjustments or maintenance

Notes: 

• 5-year warranty from the date of purchase for defective components and materials 
• Warranty is not covered after changes or modifications to rear leaf spring suspension components 

Installation Guide