Conversion to a 4 wheel drive truck

To the best of my knowledge, it can't be done to your vehicle. I believe the frame is different between the two types. IF it could be done, it would cost thousands. You would basically need a new front end, transfer case, all steering components, you wound have to purchase an axle and differential for the front, the computer in your truck wouldn't work, the transmission would either need modified or replaced.

The list goes on and on and on. You would save a ton of money just getting one that is 4wd.