1993 Pontiac Firebird Owner's Manual - Page 144

Disc Brake Wear Indicators Unless you have the four-wheeldisc brake option, your Pontiac hasfront disc brakes and rear drum brakes. Disc brake pads have built-in wear indicators that makea high-pitched warning sound when the brake pads are worn and new pads are needed. The sound may come and go or be heard all the time your vehicle is moving (except when you are pushing on the brake pedal firmly). A The brake wear warning sound means that sooner or later your brakes won't work well. That could lead to an accident. When you hear the brake wear warning sound, have your vehicle serviced. 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. r Rear Drum Brakes If you have rear drumbrakes, they don't have wear indicators, but if you ever hear a rear brake rubbing noise, have the rear brake linings inspected. Also, the rear brake drums should be removed and inspected each time the tires are removed €or rotation or changing. When you have the front brakes replaced, have the rear brakes inspected, too. Brake linings should always be replaced as complete axle sets. 143 on um 3 arlve rake pads could resu I - -