Well officially my vibration was caused by the roof marker lights.
With suggestions from H3Lady and Hummer of Novi, I popped the plastic caps and unscrewed the screws to find that my weather stripping was to thin (not doing it's job).
With new weather stripping from Home Depot 1/4 inch thick by 3/4 inch wide single sided adhesive (foam - easy to compress) the vibration is gone.
I placed the new weather stripping about 1/4 in back from the front edge of the roof marker lights on the underside (adhesive upward), tightened the screws back down and I was done.
At each end the original weather stripping has double sided adhesive for roughly 6 inches. I peeled mine off but ended up leaving the center area and applied the new weather stipping over the top of the old.
A test drive later and no vibration - and I didn't have to leave it at the dealership all day.... : )
Actually really easy and it doesn't look any different from before - the screws are torx though size 25.
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