The vacuum pump is attached to the engine and maintains the pressure between the outside air and the engine intake manifold. The pressure created helps run different systems like ventilation and power braking. When your vacuum pump fails, your only option is to replace it. We at American Fleet & Auto Service in Appleton can replace your vacuum pump. Our technicians are knowledgeable in all things vacuum pump replacements. Give us a call at 920-968-0236 or go to our website to schedule an appointment with us.