The 2003 Chevrolet Cavalier radiator drain petcock is located on the bottom of the radiator. The drain will be towards the right side of the radiator.
Look down as soon as you open the hood!
there is a petcock on the bottom of the radiator, passenger side. it is tricky to get to, but it can be done.
Turn it counter clockwise to open.
How do you change a coil pack on a 1997 cavalier
Some cars during those years did not have a petcock. Need to lossen the bottom hose and drain.
Open the radiator petcock by turning in the normal direction, left. See "Related Questions" below for much much more...
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Float stuck open
Looking at the car from the front, the petcock is on the lover right hand side of the radiator. It doesn't twist, rather pulls out. Pull it toward the engine and it should open.
look at the bottom or rear of radiator
Coolant is flushed from the radiator of a 1997 Honda Accord by opening the petcock and allowing the system to drain. The petcock is then closed, the system filled with water, and a flush added to the radiator to cleanse the system.