Steering Column Repair: knocking sound in steering column, chevy suburban, dollors

Question
We have a 2002 Chevy Suburban. Purchased used last November, within the first month we began to hear a knocking sound in the steering column.  Took it in, they admitted it was a fault of the 2002 model...that the bearings in the column had to be repacked in grease every year or so.  They did so but now, almost a year later, the noise is back and it is out of warranty.  We need to know if its something we can tackle or need professionals.
Thanks.

Answer
hello les
how right u are about this problem it is nothing u want to tacklie i would let a shop do this it should be no more than a 100 dollors and first i would check with the dealer see if they will fix this once for all they should make it right pete