I have a friend with 02 lb7 and he unhooked his egde juice with attiude while the ignition was on and now the truck will turn over but will not run what do we need to do we have tryed unhooking the battery cables turning the key for 10 to 15 min and we have cycled the key 6 times and tryed and still the same the fuel, oil, trans temp gauge will not work only guage that works normal is the amps