That's what I'm afraid of. I really don't want to switch the dash harnesses, more trouble than it's worth if that's the case but I will google it and see if there's anything on utube. I'm sure I could wire up the windows to work but the master would not operate the passenger side that way so it kinda defeats the purpose. I paid $500 for the parts truck, runs and drives, 4wd, but rusty. I bought it more for the front bumper assembly and related parts to repair collision damage that occured before I bought the 2500 so anything extra I can use off it is a bonus. Boneyard will pay $600 for it when I'm done so good deal all around!