1997 Pontiac Bonneville Owner's Manual - Page 283
1997 Pontiac Bonneville Manual
Page 283 highlights
Brakes Brake Fluid your brake system fixed, since a leak means that sooner or later your brakes won't work well, or won't work at all, So, it isn't a good idea to "topoff' 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 w'orkis done on the brake hydraulic system. Your brake master cylinder reservoir is here. It is filled with DOT-3 brake fluid. There are only two reasons why the brake fluid level in the reservoir might go down. The first is that the brake fluid goes down to an acceptable level during normal brake lining wear. When new linings are 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 shouldhave If you have too much brake fluid, it can spill on the engine. The fluid will burn the engine if is hot enough. You or otherscould be burned, and your vehicle could be damaged. Addbrake 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 on. A chime will sound if you try to drive with this warning light on. See "Brake System Wming Light" in the Index. 6-30