I did check the front end while I had the truck on a lift installing my trans temp sensor. I commented on how tight everything was.
Yesterday I had my wife turn the steering wheel back and forth and as I watched from underneath. The tie rod at the pitman arm would pop up about 3/8" every time she changed direction! No side to side play though. I replaced the part yesterday morning and it seemed to make a difference. I took the truck up on the highway and cruised at 75 straight as an arrow. I don't make my first trip with our trailer for a few weeks but I did find an adjustment off on the hitch head which should get the towing straightened out..
Good to see, that you have corrected the issue. Nothing more "white knuckle" or frustrating then fighting the front end, on these beasts. Happy Rv'ing! :B
P.S. don't waste your money on the steering box brace, had one on my 05 didn't stop the pitman arm tie rod from wearing out or prevent damage to the steering boxing, I replaced both after installing the "brace".