[arcticdude]

From what I remember (it's been 30yrs since I wrenched one), the tilt mechanism bolts to the column. Those bolts (torx, iirc) can work loose. Tighten them and the wiggle goes away. The only special tool you might need is a fairly stout "U" shaped deal with a female threaded end center bolt. The female end threads down over the steering wheel nut threads and then you tighten the nut on the tool to compress the spring that pushes up against round plate. Once compresses, you remove the circlip, the round plate comes up and you should have access to everything. Reverse to reinstall. Any of the tool loaning parts houses will have the GM column tool.

With enough as$ , you can also use like a 1 1/2" open ended wrench to push the plate down and remove the circlip. It's much easier going back together to do this.

Hope that helps.