Well I have an interesting story about my top repair.
Last weekend while at Panama City Beach the toneau cover would not deploy while putting the top down. After a couple of tries it went down, but after putting it back it was done. It wouldn't look any longer.
This was the first malfunction I have experienced with the vehicle in the year and half that I have owned it. I followed the advice of the forum and found the nearest XLR certified dealer. It was only just over an hour from my house.
The tech check the car and found that the code that control the deployment of the cover was missing! How the heck does computer code go missing? Anyway he phoned someone at GM and they told him to reprogram the top control module (TCM) and that if the vehicle malfunctioned like that again the TCM would need to be replaced. So I made it out of the dealership for 93 dollars and my fingers crossed.
I would love to hear anyone's theory on the code loss and how they think it might have happened.