GM Service Manual Online
For 1990-2009 cars only

Your vehicle may have Magnetic Ride Control that automatically adjusts the ride of your vehicle. Automatic ride control is achieved through a computer used to control and monitor the suspension system. The controller receives input from various sensors to determine the proper system response. If the controller detects a problem within the system, the DIC will display a SERVICE SUSPENSION SYS message. See DIC Warnings and Messages for more information. See your dealer for service.