I started feeling some vibration in the brake pedal and steering wheel if I'm at idle or when I stop 10,800 miles on the truck before now it was smooth.I can't place any one thing as the culprit but if any of you have the same thing chime in.And happy thanksgiving to every body at the dieselplace

I to am having the above mentioned problem, The dealer has replaced the power steering pump but that was no fix. What we have discovered is that the high pressure hose to the hydro boost unit is amplifying vibration up from the power steering pump to the hydro boost. grab the hose with the engine running and apply the brake (helper) and you will notice vibration goes away. Let the hose go and vibration returns. Their head Mechanic told me they would be working with TAC assistance and probably fabricating a bracket with a rubber insert to wrap the pipe and thus absorb the vibration. My truck will be the guinea pig.....
However try this , loosen the pipe at the hydro boost unit (18mm spanner) and where the pipe is insulated push it down against the hydroboost accumulator assembly place a bit of pressure on it then tighten the gland nut. This has completely eliminated my vibration. Now will just wait to see what the dealer comes up with.........
Laker