I do carry a gun in my truck. Locked in a floor safe in my vehicle. My CCW has to go there as well during the day when I'm at work, which means right now as I'm typing this there are two guns out there
.
Let's face facts here for a second. Most homes are just as easy (if not more so) to break into as most vehicles. Usually more cover for the thief and it's easier to pattern your behavior as to when your home will be unoccupied as to when your vehicle will. I'm on the road so much for work and in and out of mine.........good luck figuring out when's a good time to break into it.........
Granted, I don't particularly like leaving a gun in my truck without an extra layer of security, but that's what the floor safe is for. The typical smash and grab guy isn't likely to make off with the gun. It'll take too much of his time trying.
Layers of security at home and on your vehicle.........and keep your gun how you want........
That all being said, my gun isn't in case my truck breaks down. More like if society does, either on a large scale (riot) or small one (assault/carjacking, etc.). I carry an emergency kit with food, water, basic first aid and survival gear in my vehicle. I got in the habit of doing this when I was a college student in the Appalachians with a car that was dodgy at best sometimes. Break down in the winter, at night in the wrong place, and you can get dead quick up there from hypothermia. I'm also a AAA member and pay extra for the premium package with better roadside assistance benefits. It's paid for itself several times in no-cost to me towing and lockout coverage.
Layers of security folks..........a gun ain't always the answer.........