The Silo

The Silo is a quest in the Fallout: New Vegas add-on Lonesome Road.

Quick walkthrough
Now that you have made your way to the Hopeville Missile Silo, you must find a way to open the blast doors in order to make your way to the Lonesome Road. Navigate the missile silo to find a familiar companion who will assist you in operating the blast door terminal.

Detailed walkthrough
When first walking into the bunker, there will be a console that needs to be interacted with, yet you can't with your current knowledge, so head to your right and operate the terminal to gain access to the maintenance area. Inside you will find several robot pods and another terminal. Upon operation, you can release a robot, this is where you meet the ED-E. After talking to ED-E and recruting him as a companion, ED-E then proceeds to tell you that he can disrupt terminals with small satellite like dishes on them. Bring ED-E back to the console in the main room and he will proceed to return power to the Silo Door Control Terminal. Throw the switch on the console and watch the doors open as you power up the silo, revealing 2 ED-E copies reparing what looks like a missile.

Now the task is to get to the top floor, where you can use ED-E to unlock the Hopeville Silo Mainframe controls. Throw the switch and open the Silo's exterior doors. Upon opening them, several turrets and Sentry bot will attack you. After dealing with the turrets and sentry bots, follow the quest marker to a door that leads to Hopeville and finish the quest.