1997 Pontiac Bonneville Owner's Manual - Page 285

Brake Wear Your Pontiac has front disc brakes and rear drum brakes. a Disc brake pads have built-in wear indicators that make high-pitched warning sound when the brake pads are worn and new pads are needed. Thesound may come and go or be heard all the time your vehicle is moving (except when you are pushingon the brake pedalf i i y ) . Some driving conditions or climates may cause a brake squeal when the brakes are first applied or lightly applied. This does not mean something is wrong with your brakes. See "Caliper/Knuckle Maintenance Inspection" in Section 7 of this manual under Part C "Periodic Maintenance Inspections." Properly torqued wheel nuts are necessary to help prevent brake pulsation. When tires are rotated, inspect brake pads for wear and evenly torque wheel nuts in the proper sequence to GM specifications. Your rear drum brakes don't have wear indicators, but if you ever hear a rear brake rubbing noise, have rear the brake linings inspected.Also, the rear brake drums should be removed and inspected each timethe tires are removed for rotationor changing. When you have the front brakes replaced, have the rear brakes inspected, too. Brake linings should always be replaced as complete axle sets. See "Brake System Inspection" Section 7 of this manual in under Part C 44Periodic Maintenance Inspections". L brake wear warning sound means that e soon your brakes won't work well. That could lead to an accident. Whenyou hear the brake wear warning sound, haveyour vehicle serviced. I NOTICE: Continuing to drive with worn-out brake pads could result in costly brake repair. 6-32