1993 Buick Riviera Owner's Manual - Page 238

Brake Master Cylinder your brake master cylinder is here. It is filled with DOT-3 brake fluid. you'll have too much fluid when get new brake you linines. You should add (or remove) brake fluid, as necessary, only when work is done on the brake hydraulic system. U I I A CAUTION: 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,arr' your vehicle couldbe damaged. Add brakeflutu only when workis done on the brake hydraulic system. When your brake fluid falls a low level, your brake to on. See System Warning There are only two why fluid reasonsthe level brake in light will your master cylinder might go down. The first is that the Light,' in the Index, brake fluid goes down an acceptable level during to normal brake lining wear. When new linings are in, put up. the fluid level goes back The other reasonis that fluid 'is leaking out the brake system. If it is, you of should have your brake system fixed, since a leak means your brakes won't work well, or that sooner or later off' won't workat all. So, it isn't a good idea to "top your brake fluid. Adding brake fluid won't correct a leak. If you add fluid when your linings worn, then are 236