Product updated on 2021-03-19, Air liftAIR:89388, 2019+ Silverado Trail Boss and Sierra AT4 1500 AirLift Load Lifter 5000 Ultimate Plus Series, Up to 5,000 lbs. of load-leveling capacity, Eliminates squat, trailer sway, rough ride and bottoming out., LoadLifter5000 Air Spring Kit by Air Lifts are specifically engineered for hauling or towing heavy loads. LoadLifter 5000 air springs are designed to fit popular vehicles and pickup trucks, motor homes, commercial trucks and other severe uses.