In a 2002 trailblazer it is located on the bottom of the radiator one the passenger side. Every other model year to my knowlege does not have drain plug.
Place something to catch the engine coolant beneath your 1990 Chevy Corsica radiator. Remove the radiator drain plug with a 9/16 ratchet. The engine coolant will drain out.
Look at the rear or bottom of the radiator
Disconnect the lower coolant hose.
Remove the drain plug from the bottom of your 2002 Chevy Camaro radiator. Allow the coolant to drain out into a container. When all the coolant is drained out replace the drain plug to its original position. Fill the radiator with new coolant.
The radiator drain plug on a 2004 Chevy Venture is located at the bottom, left side of the radiator. It allows for the coolant to be quickly drained during maintenance.
There should be a drain valve on the radiator on the bottom passengers side If not just undo the bottom radiator hose.
I assume you want to change out the water pump and would like to know if you can do it without draining the radiator. You will lose approximately all the coolant in the radiator reservoir when you remove the radiator hose from the water pump. If the coolant is in good, clean condition, it might be wise to drain the radiator into a container and re-use the coolant.
there is a drain plug/petcock in one of the corners on the engine side of the radiator. you just have to open that and the coolant will drain out. remember coolant is hazardous to pets as well as the environment.
its there....i think its a screw on the very bottom of the radiator..faces the ground if you dont see one disconnect the lower radiator hose
Open plug at bottom or rear bottom of radiator
Plug at bottom or rear lower section of radiator