01 cadillac
i have a 2001 cadlilac deville. idles fine. gets hot while driving and over heats and blows cold air out the vents while on HOT. I flushed the radiator several times, flushed the heater core, replaced radiator, thermostat, water pump. I burped it several times. last time I parked on a hill with the passenger side in the air to help get any air out. STILL ACTS THE SAME WAY AS DAY ONE !!! any ideas next?