Close your garage door and remove your existing garage door lock.
Remove garage door lock barrel.
Install the new lock according to the manufacturer s instructions.
Depending on the model you have you may need to pry it out with a crowbar and hammer or remove it with a drill.
Locate the lock cylinder on the interior face of the door.
Replacing the lock or handle on a garage door can be accomplished with the appropriate tools.
However the bad news for you since you say that you ve not got a key is that you generally need a key to be able to easily take the cylinder out.
Grab the pin with a pair of pliers to remove the pin from the shaft.
Step 3 install replacement.
You can also open a door by using the old wire clothes hanger trick.
Examine the handle and trim on the interior side of the door.
Open it up make a hook at one end.
Insert the pin straight through the lock cylinder to reach the lock s release mechanism.
Use a lock assembly kit to mount the new lock on the inside of the.
Remove the pin that secures the inside lock handle to the lock shaft in the center of the door panel.
You can just see the wires in the above piccy.
Just like my door.
Place the nuts and bolts aside.
Pull down and you should release the lockingbolts.
Remove the nuts and bolts securing the lock bars to the cylinder with a wrench.
Slide it under the door and catch the wires that actuate the lockingbolts.
There may be a small pinhole holding the handle in place.
You can remove the lock measure it and replace it while you wait for the new one to arrive it only takes a matter of seconds with the key to remove the cylinder.
Insert a straightened paper clip into this hole and apply pressure to release the interior handle.