1996 Pontiac Grand Prix Master cylinder

Your master cylinder is one of the major componets of your brake (actually every part is important) sytem. Not only do you risk loosing your brakes completely, but you risk doing damage to othe things like you power booster. Try getiing the part from a junk yard. Remember that gm is very compatable and you may be able to use a few other makes and models from the GM family.