look at your knee cap straight legged, is it pointing forward? Then look at it in let's say 75 degree squat, is it pointing forward? When I say forward is it in line with your middle two two toes. What I'm getting at is your IT band may be pulling it to the outside, not in its little cradle it is supposed to be in. I have ran a couple marathons and some tri's and this kept happening to me until I found out tight IT bands are the cause of a lot of knee issues. Roll it out, or go get a deep tissue and then maintain it with a roller. Hope this helps.
Oh yeah, nice vette. I have a lightning with 605 hp that eats stock vettes for breakfast. I don't think yours is stock though is it?