1998 Pontiac Grand Prix Owner's Manual - Page 309

So, it isn't a good idea to "top your brake fluid. off' Adding brake fluidwon'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 workis done on the brake hydraulic system. b What toAdd When you do need brake fluid,use only DOT-3 brake fluid -- such as Delco Supreme l l @(GM Part No. 12377967). Use new brake fluidfrom a sealed container only. A CAUTION: - Always clean the brake fluid reservoir and the area cap around the cap before removing it.This will help keep dirt from enteringthe reservoir. If you have too much brakefluid, 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 low level,your brake a on. warning light will come See "Brake System Warning Light" in the Index. I A CAUTIOP' With thewrong kind of fluid in your brake system, your brakes may work well, or they not may not even work at all. This could cause a crash. Always use the proper brake fluid. 6-34