I dont have a door key. So what i do when i want to lock up the truck it is lock pass door from inside. Roll up drivers door glass, leave vent window open. Shut door. Reach in through vent to lock door, then close vent. Most people wont notice the vent window unlocked. And if they do, wont know how to unlock door anyhow. Ive been meaning to get a door key setup, about 2 years ago. headscratch