Steering Column Noise-Please Help!

I was driving down the highway the other day in my 89 Caprice Classic Brougham LS, and all of a sudden at 65 MPH an annoying rattling noise started coming from the steering column or dash (its hard to tell). When I drive at 35 MPH or below the noise comes and goes, but at higway speeds it its constant and sounds like I have steel BB's tumbling around in my steering column. What could this be? And how do I fix it?

I am also still looking for companies that make Exuast systems and Intakes that will work on the Carpice, If anyone knows some good sources, please let me know.

Thanks

Hvyrghtfoot

More than likely it's coming from your dash, and it's the speedometer cable.

Agreed. Speedo cables can get dry and rattle or chirp like a bird - the speedometer head may need some lubrication too while the dash is out . . .