Thanks for the info. With my LML, the idle was very noticeable along with the exhaust note when it was in regen mode. This new LP5, I have not noticed the idle speed increase. In fact, it seems like normal engine idle. If this is the new regen idle speed for the LP5, then I am impressed because it is not noticeable. I just wish GM would include something like a page in the info screen that would let you know. Other then that, I am just driving and enjoying her plus it has a warranty if it has any issues.