[ob_1jr]

yeah, hopefully the dealership isn't lying to you when they say they cannot communicate with the ECM. Hopefully it is fried to the point that GM cannot see any parameters in the ECM. (even after it is taken out of the truck and sent back to GM) I know my dealership told me that GM is starting to void warranties if they suspect programmer use and can download the tables and see if any calibration is not GMs. I know they cannot outright just deny warranty just because of a programmer, but they might try to do that if they figure out that you were trying to use a programmer. Hopefully the dealership helps you out on this. Keep us posted on what happens.