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2017 Chevrolet Colorado - intermittent wobble on front right side

At highway speeds there’s a shimmer or warble from the front of the truck feels like front right it comes and goes the dealer can’t seem to find the problem

Were they just rotated? Is this a new phenomenon?
A couple of ideas.
Have them rotated again, request use of torque wrench rather than impact wrench. See if shimmy changes location or is corrected.
You can also try a different dealership.