I have a 2000 Tahoe 5.3 . Every once in a while my check engine light will flash and then stay on. The latest code is P0300 Random misfire. The truck continues to run fine. There are no idle issues, gas mileage issues. It runs as it normally does. If I add a fuel additive, such as SeaFoam, or run premium gasoline, the light will shortly after go off. One more thing, while the light is on and I go down a hill and am coasting, the light will start flashing and stop flashing when I am back on the gas.
Does anyone know what this might be
Does anyone know what this might be