Oil drain plug

where is the oil drain plug located on a 2002 chevrolet tracker?

On the bottom of the oil pan.

I strongly recommend that you get a repair manual before proceeding. It’s not unheard of for someone trying to figure out how to do their first oil change to drain the tranny, add 4 quarts of oil to the engine, and then drive away.

You can get the repair manual from the auto parts store, they are not expensive and will save you a lot of trouble.