Rustpot
M Frame Lover
It varies by state.yes. your vehicle is an extension of your home and doesnt fall under the statute afaik
In Michigan, as noted by the map, you must disclose you have a CPL (concealed pistol license) at the onset of any interaction with the police, regardless of whether you're currently carrying. Your vehicle is not treated the same as your home as you cannot have loaded long guns in your vehicle (nor pistols without a CPL).
Which is one reason AR and other rifle-type pistols have as much popularity as they do. I can't keep a "truck/trunk gun" in the form of a rifle or shotgun, but if that firearm is a pistol it can live in my vehicle and be carried loaded on my person at any time (state/federal no-carry and intoxicated notwithstanding).