Where are the Coolant air bleed valves on 2002 Buick century?
Coolant bleed valve is located on the driver’s side where the radiator hose connects to engine fitting under the MASS airflow sensor. Should be a brass fitting and takes a 7mm nut driver. Low coolant sensor is on the radiator (toward engine) on the passenger side directly below the radiator cap. The sensor is a small black square with one wire plugged into bottom of the unit, held in place by metal retaining clip.