buzzing door

My 2002 malibu back right door buzzes when I lock it with the remote. Is this normal or do I need to repair the lock?
Hotpipes

sounds like the door lock actuator is bad. If its working leave it be though. I wouldn't mess with it until I needed to. They are not impossible or anything, just a pain in the butt.

jyount
Thanks for the help I will do as you suggest. Sorry for slow response.
hotpipes