2003 Chevrolet Astro Owner's Manual - Page 262

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 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 first applied or lightly applied. This does not mean something is wrong with your brakes. Properly torqued wheei nuts are necessary to heip prevent brake pulsation. When tires are rotated, inspect brake pads for wear and evenly tighten wheel nuts in the proper sequence to GM torque specifications. Brake linings should always be replaced as complete axle sets. See Brake System Inspection on page 6-31. The brake wear warning sound means that soon your brakes won't work well.That could lead to an accident. Whenyou hear thebrake wear Brake Pedal Travel See your dealer if the brake pedal does not return to normal height, or if there is a rapid increase in pedal travel. This could be a sign of brake trouble. Brake Adjustment Notice: Continuing to drive with worn-out brake pads could result in costly brake repair. Every time you make a brake stop, your disc brakes adjust for wear. 5-45