HI All, Just had my dash firmware updated and it is much better. My 21 RT couldn't seem to stay on day or night mode during the day - and it was real frustrating. The new firmware improves the light sensor and it now stays on day and appropriately switches to night mode The ECM firmware fixes a hot start problem (that I haven't had) and makes small updates. I figured it couldn't hurt to get it updates while I had it in. The dealer did it under warranty.