In my Chevy PU I put a left hand holster ( the hard plastic kind ) betwen the seat and the console, and secured it to the plastic cosole with double sided carpet tape. The pressure of the seat cushion helps keep it in place. Be sure to get it far enough forward so as not to conflict with a pistol in a right side hip holster while you are seated. I didn't on my first try and it was a little crowded down there, with 2 handguns in holsters and the seat belt buckle . Of course I dress out at about 270#, so for normal humans this might not be a problem.
A freind screwed a hard plastic holster under his dash just to the right of the steering column of his PU. He says it works well for him and you can only notice it if you look for it.
There's this police officer in my country(INA) that carry (off duty) a man's purse loaded with cash & gun. He's going to do some shopping when suddenly a motor cycle pass by & snatch the bag.
Guest what he's doing next cause he even put his mobilePhone on the bag.