My 2003 has been doing this thing where at about 65 - 70 mph the steering wheel seems to shake back and forth. It's not terrible but it's definitely there. The truck isn't lifted and doesn't have crazy tires. It honestly started doing it out of the blue. It hasn't gotten any worse or better. I had the tires rotated and balanced and only one needed to be road balanced. It is 4x4. I also lifted the front end up and tried to move the tires to see if there was any play but everything seems tight. The steering also feels tight. Any thoughts would be greatly appreciated.