16 mm
The 1991 Pontiac Grand Am radiator drain plug can be found on the bottom of the radiator. The radiator drain plug will be in the center of the radiator bottom.
On a 2003 Pontiac Grand Am, the radiator drain plug is located at the bottom of the radiator, typically on the driver's side. It is a small plastic or metal valve that you can turn to drain the coolant from the radiator. Make sure to use a container to catch the coolant when you open the drain plug, and be cautious as the engine may still be hot. Always consult your vehicle's manual for specific instructions and safety precautions.
on the radiator
for what motor? a 3.8 L would be 0.060
On the oil pan.
It is on the bottom of the radiator on the drivers side.
Most vehicles do not.
There is no drain plug assuming it is an automatic transmission it is drained when removing the transmission pan and changing the transmission filter.
Right under the battery
Should be at the bottom of the radiator logically...
there may not be one if there is it is on the bottom if not you just remove the bottom radiator hose to drain
If it does not have a drain plug, just simply remove the lower radiator hose.