Thanks for the replies. The inductive heating for the FICM is actually not the motivating factor to update. I don't think that part is a negative side affect though. The real reason is for the buck/jerk when pulling a large fifthwheel. Mine will buck something fierce at some points mostly when in fourth gear TC locked. It is a fairly early '04 and I am under the impression I still have the more agressive tow/haul and have accepted the fact that might change. If it cures the buck, it will be worth it for sure. As for the Edge will it cause problems with the flash by being hooked up? I don't plan on completely removing it if I need to, just unplug and let it sit there. Like I said, my dealer already knows I have it. Also, since the labor is cheaper than the $100 deductible, warranty will not even be involved.