Originally Posted by ptrfair
Any thoughts? it may very well be that shaft which is making the noise, but im guessing maybe soemthings loose or stripped. Any input is appreciated.
I would start at the wheel and work my way down to the rack, checking all the bolts. I haven't had the pleasure of working on the later models, but GM seems to work in a groove when it comes to these things. Double D steering shaft, 30 spline coupling, and a rag joint to dampen out vibration. If the double D is loose (it telescopes on impact to keep from ramming the wheel into your chest) or any of the shaft bolts, the car will have the ability to wander a little, yet still pass an alignment check.
BTW, did GM fix the tilt-wheel problem in newer models? It seems like every tilt-wheel from the 70'* to mid 90'* eventually works loose on the 4 bolts that hold the universal to the column...resulting in a steering wheel that flops around a little (or a lot) as the bolts work loose.