1995 Cadillac Fleetwood Owner's Manual - Page 243

Brakes Brake Fluid There are only two reasons why the brake fluid level in the reservoir might go down. The first that the brake fluid is goes down to an acceptable level during normal brake lining wear. When new liningsare put in, the fluid level goes back up.The other reason is that fluid is leaking out of the brake system.If it is, you should have your brake system fixed, since a leak means that sooner or later your brakes won't work well, or won't work atll. a 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 when your linings are worn, then you'll have too much fluid when you get new brake linings. You should add (or remove) brake fluid, as necessary, only when work is done on the brake hydraulic system. Your brake master cylinder reservoir is here. It isfilled with DOT-3 brake fluid. 6-26