my friend has an 03 lb7 he was triying to install a ppe tuner and the ecm locked down on him. I tried to reflash it and it would just say after initalizing the bootloader that the ecm voltage was to high or low. He took it to the dealer and they told him the ecm was fried. we repalced it and the new one does the same damn thing. btw we have tried new batteries, charger, no charger. we have tried it at every voltage possible from 11.5 to 13.8 and NOTHING makes a diffrence we have checked every fuse wire and added on accessory we can think of please HELP