Where is 2002 Nissan altima radiator drain plug located?

Crawl under the car and look up at the radiator near the passenger side. you should see a hole in the body plastic that helps protect any debris from hitting the engine. The hole is for the radiator drain plug and it takes a fat Philips screwdriver to undo the plastic plug. If the coolant is dark green, you waited to long to change the fluid, hope a good flush fixes any cooling problems. on a scale of 1-10, I would rate it a 2 since all it takes is some fluid and a screwdriver.