1995 Buick Century Owner's Manual - Page 227

Brakes Brake Master Cylinder Your brake master cylinder is here. It is filledwith DOT-3 brake fluid. is the fluid level goes back up. The other reason that fluid is leaking outof the brake system. it is,you If should have your brake system fixed, since a leak means that saoner or later your brakes won't work well, or won't work at all. So, it isn't a good idea to "top off" your brake fluid. Adding brake fluid won't correct a leak. If you add fluid whenyour linings areworn, then There areonly two reasons why the brake fluid level in your master cylinder might go down. The first that the is brake fluid goes down to an acceptable level during normal brake liningwear. When new linings are put in, When your brake fluid falls to low level, your brake a on. warning light will come See "Brake System Warning Light" in the Index. 6-23