Arnott's new economical rear air shock replacement for GM vehicles with Autoride suspension will convert the rear of the vehicle from electronic air shocks to passive air shocks. This adjustable shock will keep the vehicle at the proper height and provide a smooth, comfortable ride. This easy-to-install shock includes an Electronic Bypass Module (EBM) to turn off dashboard warning lights, and an instruction manual. Arnott recommends replacing rear shocks in pairs if converting the Autoride suspension to this passive air shock. Not applicable for vehicles w/Magneride suspension.