1998 Buick LeSabre Owner's Manual - Page 278

Brake Wear Your vehicle has front discbrakes and rear drum 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 areneeded. The sound may come and go orbe heard all the time your vehicle is moving (except when you are pushing on the brake pedal firmly). Some driving conditions or climates may cause a brake squeal when the brakes are firstapplied or lightly applied. This doesnot 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 arenecessary to help prevent brake pulsation. When tires are rotated, inspect brake pads forwear 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 the rear brake linings inspected immediately. Also, the rear brake drums should be removed and inspected each time the tires are removed for rotation or changing. When you have the front brake pads replaced, have the rear brakes inspected, too. Brake linings should always be replaced as complete axle sets. See "Brake System Inspection" in Section 7 of this manual under Part C "Periodic Maintenance Inspections." The brake wear warning sound means that soon your brakes won't work well. That could leadto an accident. When you hear the brake wear warning sound, have your vehicle serviced. I NOTICE: Continuing to drive with worn-out brake pads could result in costly brake repair. 6-28