i dont know where you go piggy ...
but there is a dealership in raliegh, i belive near morrisville or cary called Johnson Lexus...how far is that from you?
little problem like that need to be approached slowly... i mean .. not all mechanics are going to figure out right away... they only work there remember that... Y would they care .?
i think with the problems your having... any body who's really good with cars can help...
to be honest .. from my experience,, Gm workers really know that they are doing....
My torque converter went out on my old car.... it took a real long time figureing out that it was the problem... sometimes you just get unlucky
good luck.... be patient... im sure its a small problem, just a !Removed! to figure it out...