I need to change my fuel tank on 94 pontiac grand am. want to make sure i am going to do it right

Try to have the tank as empty as possible.This will help in the removal process.Relief the fuel pressure by removing the fuel pump fuse or relay and start the car and let it run til it kills. Remove the straps that hold the tank in place and loosen the hose clamps to the filler and breather hoses.Lower the tank enough to unplug the fuel pump connectors and lines,remove the tank.Be very careful around gas or fumes.They are very flammable.Safety always.The amount of money you save is not worth you getting hurt or killed.