Manager and crew typically show up 5 min after opening hours... then they keep the door locked until they are "ready"... it's best to not try to stop by right on time if you are in a hurry, like me today. Otherwise you might be pretty upset that you will be late for something that you need to be on time for, like me today.
Plan on showing up no earlier than 15-30 min after they are supposed to be open....
Other than that this Autozone is pretty much like 95% of all the other ones.