Shaper is correct, my 46 is on an S-10 frame. Without knowing where your tires are rubbing, it's impossible to help. It also depends how the truck sits (where the body was mounted on the frame and if the suspension was lowered) Chances are the backspacing of the wheels is all wrong. I custom ordered my wheels, so I'm running 15x8" on the front with 3-1/2" backspace. I have no rubbing issues at full lock either direction.
I've got 15x10" in the rear, but we tubbed it and I actually have room for larger wheels if I wanted.
If you can give us some more info and some pics maybe we can help determine the issue.
You'll probably need to measure the truck and purchase wheels accordingly for what you need.