chevy front end

I have a 2002 chevy truck with 30000 miles. It's been in the dealers shop three times for a clunking noise in steering column you can also feel this in the steering wheel. the dealer will lub the column and it will be ok for awhile then it's back. anyone else have this problem ?

Try pulling on the steering wheel. If it will pull in and out the bolts inside the column may be loose. Happened on mine at about 40k.