My 2000 squeaks when going over speed bumps, dips etc. I have taken it to a garage where they have lubbed the front and rear control arm bushings which worked for a couple of weeks then the squeaking started again. I took it back and this time he heated them and re lubbed them and once again it worked for about a week or two and started again.
Question- in Corvette America and Ecklers catologs they show two bushing kits.one for under $100.00 and one for $269.00. The difference being the more expensive one has 4 billet off-set upper control arm shafts. Do i really need to buy the kit with the billets (should they be part of the squeaking problem or not). Or can you tell one way or the other?

 

I'm experiencing the same thing with my 98. I have done a lot of internet surfing on this and still have'nt come up with a remedy or a real cause, I have even had the dealer here in town tell me, "Ah all these vettes do that".
It's more annoying than anything. I have heard that installing all new "poly" bushings will help, but I just can't believe they drove them off the assembly line sounding like this, has to be some easy fix/repair out there.