1998 Pontiac Grand Prix Owner's Manual - Page 310

NOTICE: 0 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 may sound come andgo or be heard all the timeyour vehicle is moving (except whenyou are pushing on the brake pedal firmly). 0 Using the wrong fluid can badly damage brake system parts.For example, just afew drops of mineral-based oil, such asengine oil, in your brakesystem 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 it off immediately. See "Appearance Care'' in the Index. The brake wear warning sound means that soon your brakeswon't work well. That could lead to an accident. When you hear the brake wear warning sound, have your vehicle serviced. I NOTICE: Continuing to drivewith worn-out brake pads could resultin costly brake repair. 6-35