GM Repair Problems? Ask GM Repair Expert Now.
Ok. So, the bleeder has to be through the radiator cap. It's been replaced, still happening. Flushed radiator, it's free and clear, still happening. Changed water pump, still happening.
Like I said, you're driving along. Comes up to operating temperature. Everything's fine... then, all of a sudden it starts to creep up... if you turn on the heat, it happens faster. If you push the accelerator, it cools it down???