Where is the radiator drain plug on a 1991 grand am 2.5?
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.
If you are looking at the radiator with the hood opened up, the drain plug is on the bottom right side (the side that your battery is on) on the back side (facing the engine) of the radiator. I just had to replace my radiator and the drain plug only takes 1/4 turn to open. (You won't need any wrenches to open the drain plug either.)