1998 Pontiac Firebird Owner's Manual - Page 288

What to Add When you do need brake fluid, use only DOT-3brake fluid. Use new brake fluid from a sealed container only. Refer to "Recommended Fluids and Lubricants" the in Maintenance Schedule. Always clean the brake fluid reservoir and the area cap around the cap before removing This will help keep it. dirt from entering the reservoir. NOTICE: Using the wrong fluid can badly damage brake system parts.For example, just a few drops of mineral-based oil, such as engine oil, in your brakesystem can damage brake system parts so badly thatthey'll have to be replaced.Don't let someoneput in the wrong kind of fluid. If you spill brake fluidon your vehicle's painted surfaces,the paintfinish can be damaged. Be careful not to spill brake fluid on yourvehicle. If you do, wash it off immediately. See "Appearance Care" in the Index. With thewrong kind of fluid in your brake system, your brakesmay not work well, or they may noteven work at all. This could cause a crash. Always use the proper brake fluid. Brake Wear Your vehicle has four-wheel disc brakes. Disc brake pads have built-in wear indicators that make a high-pitched warning sound when the brake pads are worn and new pads are needed.The sound may come and go or be heard the timeyour vehicle is moving (except all when you are pushing on the brake pedal firmly). 6-35