Rear Air Suspension Helper Spring for 1999-2019 Chevrolet Silverado 1500 & More - SuperSprings SSR-209-40

Add rear load support and calm the sway when your truck is hauling or towing with the SuperSprings SumoSprings Air Suspension Helper Spring (SSR-209-40, also written SSR20940). This rear helper spring installs as a direct-fit upgrade for the 1999-2019 Chevrolet Silverado 1500, 2007 Chevrolet Silverado 1500 Classic, 1999-2019 GMC Sierra 1500, and 2007 GMC Sierra 1500 Classic — see the Buyer's Guide tab for engine-level details. As a SumoSprings Solo kit, it replaces the factory bump stops and requires no drilling to install.

• Load & sway support: Enhances load-carrying ability and reduces and stabilizes sway for improved driver control and ride comfort.
• Maintenance free: Requires no maintenance, no airlines, and no compressors — SuperSprings markets it as their leak-proof air spring design.
• Progressive urethane: Made from proprietary, patented closed micro-cellular urethane for a smooth, progressive spring rate.
• Rated capacity: 1000 lbs capacity at 50 percent compression; never load any vehicle beyond the manufacturer's GVWR.

Sold as a pair, left and right. Proudly made in the U.S.A. It compresses up to 80 percent of original height with full memory rebound. Always stay within your vehicle's GVWR.