Hi everybody. This is my first time posting. Just wanted to get a couple inputs and some thoughts on what my problem could be. I have a 2005 3.6L CTS. My car won't move. I put it in drive and I can hear it go in gear but it just won't move. The RPM's fly up but no movement to wheels. The odd thing is that if I let it sit for a couple days and go try and move it, it'll drive around the block but shortly die on me. And when I say die I mean it just stops transferring power to the wheels and I'm back to the RPM's going up but no movement to my wheels. Don't know what it could be, would love to hear your thoughts. Thanks.