Air Spring Kit, Air Lift 1000, Bags / Lines, 1000 lb Capacity, Rear, GM Midsize Crossover 2018-20, Kit. Established in 1949, Air Lift is a family-owned business from Lansing, Michigan that specializes in vehicle air suspension systems and helper springs for Passenger Cars, Trucks, RVs, SUVs, CUVs, and Vans. The Air Lift product line includes air springs, compressor systems, load support products, and related accessory components.