[VetteMed]

I think you are referring to the clip that secures the actuator for the Selective Ride Control, on to the top of the shock absorber. If you can't find it, I'd probably suggest removing the actuator entirely, temporarily at least, to avoid having it bounce off and possibly be damaged or melted on the exhaust, for example. That is, unless you can rig up some zip ties or something to hold it in place and out of harm's way.