I have sone some chev trucks & there are all kinds of diff seats.
There are what I call 1/3 driver seats only.
Some are 1/3 drivers seat & 2/3 passenger.
Some Pass are 1/3 to.
Some are bench seats, Its what ever the custemer wanted when it was bought. Or what the new oner put in there when they bought it used.
I have a IH truck with a chev suberben seat in it, No leg room sit streight up. Knees hit steering wheel.