Selectable Ride Description & Operation
WARNING: This page is about a different car, the 2002 GMC Sierra, 2002 GMC Cab & Chassis Sierra, 2002 Chevrolet Silverado, and 2002 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
The selectable ride (DR) suspension system allows the drive to choose between 12 distinct damping levels, firm and normal.
The SR dampers are gas charged units which provide damping by forcing hydraulic fluid through internal orifices within each shock in order to resist suspension movement. Each shock contains an internal solenoid actuator controls the size of the orifice that the hydraulic fluid is forced through, thus altering the ride characteristics of the vehicle.
Voltage is supplied to the switch via the ignition 1 voltage circuit from the SEO IGN Fuse. When the system is on, the voltage is supplied to terminal A of each shock providing firmer damping. Ground is supplied to terminal B of each shock.