1998 Buick LeSabre Owner's Manual - Page 277

What toAdd When you do need brake fluid, use only DOT-3 brake fluid -- such as Delco Supreme 11 (GM Part No. 12377967). Use new brake fluid from a sealed container only. @ NOTICE: Using the wrong fluid can badly damage brake system parts. For example, just a few drops of mineral-based oil, such asengine oil, in your brake system can damage brake system parts so badly that they'll have to be replaced. Don't let someone put in the wrong kind of fluid. If you spill brake fluid on your vehicle's painted surfaces, the paint finish can be damaged. Be careful not to spill brake fluid on your vehicle. If you do, wash off it immediately. See "Appearance Care" in the Index. Always clean the brake fluid reservoir capand the area around the cap before removing it. This will help keep dirt from entering the reservoir. I A CAU IN: 0 With the wrong kind of fluid in your brake system, your brakes may not work well, or they may not even work at all. This could cause a crash. Always use the proper brake fluid. 6-27