The GMT400 pickup truck platform covers 1988-1998 Chevrolet and GMC C1500 pickup trucks. Also known as “OBS” or old body style, these trucks are affordable, stylish and respond well to engine, drivetrain and chassis upgrades. Ridetech offers three types of suspension upgrades for the 88-98 C1500. StreetGRIP™ suspension systems help you get the most out of your factory A-arm and leaf-spring configuration. Ridetech offers coilover and air ride suspension conversion systems for adjustable height and improved performance. Air ride or coilover, the rear suspension features Wishbone-link arrangement for improved handling and ride quality.