old as it is, my 2000 chevy Venture mini-van came equipped with air lifts and a built-in compressor. As it is a 7-passenger model, the idea is to compensate for the weight of passengers when loaded. It has been a great feature, and has a panel with an air connector, and on-off switch in the back. It came with a hose long enough to reach the front tires, and several nozzles, including a needle for footballs and basketballs.