Actuator Door lock: 77-92 Camaro Firebird GMThis is when you have central locking in your car.. you'll have the little black or chrome toggle switch on the door trim to flick it locked or unlocked. One Per door. These may or may not look exactly like your originals depending on the year and model but are accurate for the 77 92 in Pontiac and 77 05 in various GM Camaro and others. model range.