The most important part of a garage door system to ensure smooth operation and efficiency is the garage door cable. Garage door cables are responsible for bearing the weight of the garage door as it moves along the tracking. Cables generally will be attached to a drum near the top of a garage door and follow a line towards the bottom section. When a garage door cable breaks, a once functional garage door will be immobilized. To regain proper functionality, the garage door cable will need to be replaced.