That's right! I see what you did there! Putting that heater in the glove compartment! Sneaking that Glock underneath the front seat! Why don't you do what I did, and get yourself one of these handy dandy pistol safes?
Although there is a keypad, I always use the overide key. I know, nothing can stop a determined thief, but with the burglar alarm shrieking and carrying on, the safe will limit the time he has to blow torch or sledge hammer his way to the gun.