Unstable loads while towing and hauling don't just make for an uncomfortable ride. Difficult handling, rear sag, and corner sway create dangerous driving conditions for you, your passengers, and other vehicles. Whether you're towing your RV across the country or hauling hay down the highway, our Timbren SES kits level your load, making for a safe, controlled ride so smooth, you might forget you're towing altogether. What makes Timbren SES kits different from other suspension enhancement systems? Unlike air bags, our kits require zero post-installation maintenance. And unlike other systems, you can install and haul in under 30 minutes, right from your driveway.GMRCK25D Fits 2011-26 Silverado and Sierra 2500 HD and 3500 HD Trucks, 1988-99 GMC C2500, and 1992-99 GMC C2500 Suburbans, Rear Kit

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