Arnott's new rear air shock AS-2950 for the 2006-2011 Cadillac DTS and Buick Lucerne with Sport Suspension (F55 MagneRide) converts the vehicle's electronic shocks to a much more dependable passive air shock system. The Arnott shock keeps the rear air leveling system completely operational. Arnott has designed this shock to plug directly to the vehicle's computer system without any alterations. Arnott's exclusive plug-in design allows for easy installation. Arnott Recommends Replacing These Shocks In Pairs.