[TJ91]

Call GM and make them aware of the scenario ASAP.
Video tape the car and what its doing, make sure you DO THIS.
Take the video and keep it for warranty purposes and for a way of gaining media attention. You should not be going through this Bullshit. Demand that you want a new car as you gave them the chance for a rebuilt motor, say that you are now wanting a new car period. Bring up the lemon law, personally, your entire car may be screwed because of your engine and i would not take your car period. If GM decides to do nothing, which i doubt but you never know, post the vid up here and have it hit alot of sites. I remember someone had a CTSV which was a lemon, went in for several warranty repairs, finally the owner took a video and posted it on streetfire.net. He got a new one shortly after. GM does not want negative media reaction so they will try to fix your car, but you have to now be firm and demand a new Camaro, not yours fixed. GM helped me alot with my tranny incident so i hope theyll take care of you.
Do not trade your camaro in, not worth it yet. Have them give you a new camaro, or try to talk with the rep to have you upgrade. If they wont let you upgrade to an SS. Get your new v6, sell it, and buy an SS, or pick one up from the states. Thats what i would do.
Sorry to hear about the BS your going through, but keep us posted