Rattle in front end?

[curbyk]

In my 03 Duramax I can feel and hear a rattle in the steering wheel. It is not in the cab. Truck has not been used hard and has about 55,000 mi. I complained about this when it was still under warranty (nowhere near as bad as now) and they squirted some grease somewhere and it went away until it was out of warranty. I have lived with it but it seems to be getting worse.

I'm sure this has come up before but I can't find anything on it.

Does anyone know of a recall or TSB or even what needs to be done before I take it to the dealer and is this a safety issue?

Thanks in advance for the help I know you will provide.

Curby