My Suburban developed play in the steering and a clunk from up front recently. I discovered it to be the three nuts holding down the steering arm that had backed off. I went to pull it into my driveway to tighten down the nuts, a day after a 170 mile round trip, and it clunked one last time and wouldnt steer any more. It sheered two of the three studs clean off. Has anyone ever extracted these before? I would think, that it might be easier to just change out the whole driver's side knuckle?