Just a note to let everyone know, I had the PS hose replaced on my truck when the two applicable recalls were done about a month ago. please be aware that all it did for my truck was possibly, and I mean possibly, delay the vibration by one to two miles an hour. Where it used to start at about 68 to 70 MPH it now starts at 70 to 72 MPH, so don't expect this replacement to be the cure for everyone.
I would like to find the cure because as it now stands I don't drive at 75 MPH very often or for extended periods because of the vibration. I can feel it in the steering wheel the accelerator pedal and through the seat, it is also visible in the interior rearview mirror.
But maybe I am halucinating as the service tech says he can't replicate the problem when he drives it!
Carl