A door lock actuator is a device that adds power to your vehicle’s door lock systems. A fully functioning door lock actuator ensures that your car is not vulnerable to theft or looting. Before buying one, you should consult your vehicle’s manual so as to know the most suitable actuator for your car. A door lock actuator is a device that is found on almost every automobile that controls the locking and unlocking function inside of a car’s door. There are a number of companies that offer replacement door lock actuators for different makes and models of cars.The term “Door Lock Actuator” is grandiose and mysterious enough to scare away many a do-it-yourself-er; but never fear! Life is not as complicated as it seems.Basically, a door Lock actuator is a mechanism that causes your car door to lock and unlock automatically- in a sense, before the invention of automatic actuators, the passenger or driver of the car was actually responsible for the task of actuation! The word “actuator” is applied in this sense to any mechanism that converts energy to motion. Actuators can derive energy from liquid, air, or electricity, and then convert that energy into motion, usually in the form of rotational motion. In a door lock actuator, the energy is provided by electricity from the car battery. This energy is then driven by a small motor into a series of small gears that convert the rotational motion to linear motion, a moving metal rod with a hook at the end. This metal hook, which is oriented vertically, then actually performs the function of mechanically rotating the lock.Start by trying the GM remote control door lock actuator. If it doesn’t work, open the door with the key and try the door locks with the switch on the door. If the door locks work, split the case on the remote and replace the battery. If they still don’t work, the remote is bad.