My wife's 02 LT has the same problem....I have heard and read in Car & Driver and Motor Trend of the same problem....and the dealer fixed them both under warranty. I was going to take hers in to have fixed - but we decided to trade for 04 Z-71 Tahoe.
Im sure one of these guys at this site has the TSB # - if there is one. If no response here...check gm-trucks.com
Im sure one of these guys at this site has the TSB # - if there is one. If no response here...check gm-trucks.com