The best way is to use a coolant flush machine, as it takes fluid out, it puts back in the same amount. This way the system does not get air bound.
how do you change the radiator in 96 chevrolet lumina
To drain the radiator when it is time to change the coolant.
Begin by removing the bottom radiator hose. Allow the old coolant to drain out. Replace the hose to its original position. Fill the radiator with new coolant.
open the radiator cap, find the plug at the bottom right of the radiator and open it to drain old coolant
The only way to drain all the coolant is to unhook the bottom radiator hose. The radiator does NOT have a drain vale.
Remove the drain plug from the bottom of the radiator. Allow the coolant to completely drained out. Replace the drain plug to its original position. Fill the radiator with new coolant.
Drain the radiator in a container. Remove the engine end of the top radiator hose. The housing has 2 bolts that you remove. Remove the thermostat and clean the surfaces and reinstall the thermostat. Reinstall the hose and add coolant.
It may be similar to my Chevrolet Impala Coolant sensor module is located under the upper radiator hoseLower coolant level below this point, remove old module-install new being careful not to damage "0" ring seal.
Get something for the coolant to go into like a bucket. Remove the lower radiator hose from the radiator and also remove the radiator cap to help and drain into bucket.
To change coolant on a Toyota Corolla, place a bucket under the radiator. Open the radiator drain valve and remove the radiator cap. When all antifreeze drains out, close the drain valve. Then refill with fresh antifreeze and replace the radiator cap.
To change the coolant in an AU Ford Falcon 2001 model, open the radiator drain plug and add warm tap water once all coolant stops coming out. Again drain the radiator and add the coolant.
Drain coolant from radiator plug located either at bottom or rear of radiator Re-fill slowly to prevent an "airlock"