I have heard regarding vehicle carry in TX that TX considers your vehicle to be an extension of your house.
At least, that's what a TX trooper told me when he pulled me over for speeding and I volunteered the info that I had a loaded pistol in my center console.
I was nervous because I was still fresh out of Cali, with "the fear" in me about guns/vehicles.
He said the above, then told me that as long as I kept my "mitts" off mine, he'd keep his mitts off his.