Listen up guy (and gals).
Gun (or weapon) in truck big no no.
First problem is that many states do not allow carrying a weapon in a commercial vehicle. They are very clear about it and if caught results in loss of your license and charged with a felony- pretty much ending your career.
Second most states will look the other way but the reciprocating agreements that were in place before the Clinton administration are no longer there. This means that even if you have a permit in Michigan, it does not give you a right to go to Florida and carry legally. There are exceptions but these exceptions are up to the officer who finds the gun or pull you over. Also one thing that you have to think about the drug lanes, I75, I95, I10 for example, if you are caught with a gun interstate, you can be (look I said CAN) charged under federal laws if they find anything else in the truck like your Viagra with your doctors name on it instead of yours. Never underestimate LEO’s.
If you get caught in New Jersey, say good buy to your truck - I was warned by a friend who is an MSP trooper; I knew about the restrictions on weapons but never knew they can take your truck. New Jersey has a law on the books that will not allow even LEOs to enter the state armed. New York City is about the same, Liberalism at its best.
Third as hounddog1 said airports, refineries, power plants and a bunch of other places – not to mention military bases are restricted and most fall under federal laws, not state laws. It was clear to me when I went to a chemical processing plant and saw this 6 foot tall sign “this is a federally protected site.†and has a long list of what they consider weapons. The guards who inspected my van (they went through the entire van front to back 15 minute inspection) told me that if I disclose any weapons before the inspection, they will keep it for me until I leave otherwise it is forfeiture upon discovery. Also they said any firearms found I will be held and charged with a federal crime.
So I would suggest not listening to anyone who says it is alright to carry while in a commercial vehicle. There are alternatives.