1998 Cadillac DeVille Owner's Manual - Page 315

Brakes Brake Fluid of the brake system.If it is, you should have your brake your system fixed,since a leak means that sooner or later brakes won't work well, or won't work at all. So, it isn't a good idea to "top your brake fluid. off' If Adding brake fluid won't correct a leak.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 is filled with DOT-3 brake fluid. in the There are only two reasons why the brake fluid level is reservoir might go down. The firstthat the brake fluid goes down toan acceptable level during normal brake lining wear. When new linings are putin, the fluid level goes back up. The other reason is that fluid leaking out is If you have too much brake fluid, it can spill on the engine. The fluid will burn if the engine is hot enough. You or others could be burned, and your vehicle could be damaged. Add brake fluid only when work is done on the brake hydraulic system. When your brake fluid falls to a low level, your brake warning light will come See "Brake System Warning on. Light" in the Index. 6-28