Arnott's value front strut SK-2806 for newer GM SUVs (GMT820 chassis) and Trucks with Autoride (Z55 RPO) twin-tube replacement shock, which was made for Arnott, fits the left or right side and delivers a safe and reliable ride. This easy to install shock includes pre-installed spring mounting perch and an exclusive Arnott sensor which plugs into the auto-damping system to eliminate dash panel error message.