this should be marked on side of overflow tank, cold mark and hot mark,but check tank when cold and bring up to cold mark!!
radiator cap might be leaking
Dexcool
radiator antifreeze coolant.
Intake gaskets have failed.
any vehicle that is water cooled and has a radiator needs antifreeze.
in the over flow tank
Find the source and repair it.
Any brand of antifreeze can be used in a 2001 Ford Taurus such as Prestone. The antifreeze can be 50 50 antifreeze.
The 2001 Chevrolet Malibu has 12 valves.
The 2001 Chevrolet Malibu has a V6 engine.
The 2001 Chevrolet Malibu has overhead valves (OHV).
The 2001 Chevrolet Malibu has a 4-speed automatic.