1995 Chevrolet Lumina Owner's Manual - Page 223

Brakes Brake Master Cylinder Your brake master cylinder here. It is filled with is DOT-3 brake fluid. should have your brake system fixed, since a leak means that sooneror later your brakes won't work well, or won't work at all. it isn't a goodidea to "top off' So, your brake fluid. Adding brake fluid won't correct a leak. If you add fluid when your linings worn, then are you'll have too much fluid when get new brake you linings. You should add (or remove) brake fluid, as necessary, only when work is done on the brake hydraulic system. There are only two reasons why the brake level in fluid your master cylinder might go down. first is that the The brake fluid goes down to an acceptable level during normal brake lining wear. When new linings put in, are the fluid levelgoes back up. The other reason is that fluid is leaking out of the brake system.If it is, you When your brake fluid falls to a low level, your brake warning light will come See "Brake System Warning on. Light" in the Index.