These are the 3 little cylindrical bushings that fit between the external metal gear and the internal plastic gear in your Lightning's window motor. They serve as a safety mechanism and prevent the window motor from applying too much force on the window.
Lighting Window Bushing Failure
When these bushings fail the window will usually make a loud racket when you try to roll it up. And normally it will take two hands to successfully roll it up, one hand on the button and the other hand lifting the window.
Works for all 1993-95 Lightning door windows!