• 97,000 miles
  • Wheels balanced
  • Hubs replaced
  • Steering rack replacement with inner/outer tie rods
  • Wheels aligned

So, it's vibrating? Shuddering? Loose steering?
Turning on its own when you let go of the wheel?
Is there a noise?
Is there a certain speed or RPM that it is better or worse at?

As a recommendation, I'd say to check for codes with a TechII - they can see codes that a lot of generic scanners can't. For example, the electronic brake control module, which controls Magnasteer, Stabilitrak, ABS, Traction Control, and braking stuff can throw codes, but a simpler scanner like an Aeroforce won't see it.