Abstract: The apparatus disclosed includes two posts to be installed erectly on opposite sides of a common car lift; a cantilever assembly slideable up and down on each post, means for interengaging the lift with each cantilever assembly to raise it when a car is being lifted and to drop it when the lift is being lowered, means for pinning the cantilever assemblies at selective levels on said posts, and arms on said cantilever assemblies retractably extendible to intercept a car being lowered by said lift and to retain it at an elevated position while the lift itself continues to lower to an out-of-the-way position leaving the entire underside of the car accessible for service.