Thank you, I appreciate that!Check this out and give it to your dealer:
I usually adhere to the "if it ain't broke don't fix it" philosophy, but noises can be annoying. If it's any consolation, the only time my truck ever went in for warranty service was for a squeaky driveshaft seal. But the dealer would probably have never known what to do if I had not provided them with the TSB# that GM had issued over a bad batch of seals from the factory. If you hear a noise and cannot figure it out, it is always worth searching the TSB's before taking it in...because I guarantee you most dealer techs won't even bother.
That was the very first TSB that came up in my search for suspension related TSB's.