How do you get an air lock out of a cooling system?

Air lock in cooling systems has became a problem in many autos in recent years because of there design,mainly the radiator is not the highest point in the cooling system.For that reason many manufacturers have put bleeders in the system, usually at the thermostats .The easiest way to bleed the system is to raise the vehicle so the radiator is the highest point in the system.remove the cap and let the car run until the thermostat opens,this will burp the air out of the system,be careful of hot coolant and steam escaping the radiator.Then shut off and lower vehicle,and top off radiator and coolant tank.