Vibration at 70+ mph

[RedRocker]

My '07 Z71 rides as smooth as butter until you reach or exceed about 70 mph. Ive had my tires balanced at 3 different shops over the past 6 weeks and finally today the folks at Ken Towery Auto said I had a bad hub assembly on the front passenger side. The driver side hub assembly went south last summer and now there is 105K miles on the clock. Within the past year I've changed the shocks, struts and u-joints so I'm assuming all is good on those parts. I tend to believe their diagnosis is correct but wanted to run it by other owners to see if you've had similar experiences.
Thanks

 

[blairian]

Could be the culprit, especially since you have replaced other parts. I would seriously consider it..

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[RedRocker]

That's what I'm going with. I pick up the part tomorrow and hope to install Monday.