Product updated on 2021-03-19, Air liftAIR:89204, 2007 to 2018 Silverado/Sierra 1500 2wd/4wd with 5.5 or 6.5 ft bed AirLift LoadLifter 5000 Ultimate Plus with stainless steel air lines, The Air Lift internal, jounce bumper helps to absorb shock even with zero air pressure! And who doesn't want stainless steel parts? Especially when they protect your system from the road's rage. Does not fit trcuks with 8 ft bed, 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.