2011-2017 GM HD Rear Loadlifter 5000 Air Spring Kit (ALF57338)Maximize the heavy duty potential of your Chevy Silverado 2500HD 3500HD or GMC Sierra 2500HD 3500HD with the Air Lift LoadLifter 5000 air spring kit. Engineered for those who push their trucks to the limit, this kit provides up to 5,000 lbs. of load leveling capacity to ensure your vehicle remains level and stable under the heaviest trailers and payloads. By utilizing fully adjustable air springs, you can eliminate the rear end squat and trailer sway