1998 Pontiac Bonneville Owner's Manual - Page 280

There are onlytwo reasons why the brake fluid levelin the reservoir might go down. The first is that the brake fluid goes down toan acceptable level during normal brake lining wear. When new linings are put the fluid level in, goes back up. The other reason is that fluid is leaking out of the brake system. it is, you should have your brake If system fixed, since a leak means that sooner or later your l. brakes won't work well, or won't work al at When your brake fluid falls a low level, your brake to A if warning light will come on. chime will sound you try to drive withthis warning light on.See "Brake System Warning Light" in the Index. What to Add When you do need brake fluid, use onlyDOT-3 brake fluid -- such as Delco Supreme 11 (GMPart No. 12377967). Use new brake fluid a sealed from container only. @ So, it isn't a good idea to "top your brake fluid. off' Adding brakefluid won't correct a leak. you add fluid If are when your linings worn, then you'll have too much fluid when youget new brake linings.You should add (or remove) brake fluid, necessary, only when work as is done on the brake hydraulic system. Always cleanthe brake fluid reservoir cap and the area around the cap before removing This will help keep it. dirt from entering the reservoir. 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 beburned, and your vehicle could be damaged. Add brake fluid only when work done on the brake is hydraulic system. I b,CAUTION: With the wrong kindof fluid in your brake system, yourbrakes may not work well,or they may not even work all. This could causea at crash. Always usethe proper brake fluid. 6-29