Sorry to hear that Jon... I
Sorry to hear that Jon... I know exactly how you feel. I got my C7 back after the new engine was put in. A week or two later the torque tube rattle sound came back. Took the car back and now GM is ordering yet another torque tube. This is the second time the torque tube is being replaced, and the 3rd or 4th major mechanical tear down for my car. The car has less than 13k miles on it. I am debating between a refund or equal swap right now... but I suspect the same thing will happen again if I get a replacement. So sad because I love the car!