GMC chevrolet camaro 2000 Service Manual page 487

5-14 Hydraulic Brakes
Brakes
Hydraulic Brake Diagnostic System Check (cont'd)
Symptom Causes
Uneven Braking Action (Front to.Rear) • Leaking brake line or connection. Refer to Brake
Fluid Leak.
• Leaking piston seal. Refer to Brake Caliper Overhaul
(Front) or Brake Caliper Overhaul (Rear).
• Leaking master cylinder (internal). Replace master
cylinder.
• Air in brake system. Refer to Hydraulic Brake System
Bleeding (Manual Bleeding) or Hydraulic Brake System
Bleeding (Pressure Bleeding).
• Contaminated or improper brake fluid. Refer to Brake
Fluid and Brake Fluid Handling.
• Worn out brake lining.
• Uneven brake lining wear.
• Glazed brake lining.
• Incorrect brake lining material.
• Contaminated brake lining.
• Brake lining damage by abuse.
• Improper rotor surface finish.
• Scored rotor. Refer to Refinishing Brake Rotors (Front)
or Refinishing Brake Rotors (Rear).
• Brake assembly attachments. loose (including splash
shield).
• Restricted brake fluid passage.
• Sticking caliper or caliper pistons. Refer to Brake Caliper
Overhaul (Front) or Brake Caliper Overhaul (Rear).
• Low brake fluid. Refer to Master Cylinder Reservoir
Filling.
• Improper rear brake adjustment.
• Excessive Vehicle Loading.
Scraping Noise from Brakes • Worn out brake lining.
• Uneven brake lining wear.
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• Contaminated brake lining.
• Brake lining damage by abuse.
• Brake assembly attachments loose (including splash
shield).
• Loose front suspension parts.
• Rotor corroded.
Brakes Squeak without Application • Worn out brake lining.
• Uneven brake lining wear.
• Glazed brake lining.
• Incorrect brake lining material.
• Contaminated brake lining.
• Brake lining damage by abuse.
• Scored Rotor. Refer to Refinishing Brake Rotors (Front)
or
Refinishing Brake Rotors (Rear).
• Improperly adjusted stoplamp switch or cruise control
vacuum dump. Refer to Stop/amp Switch Adjustment.
• Incorrect vacuum booster pushrod length.
• Sticking caliper or caliper pistons. Refer to Brake Caliper
Overhaul (Front) or Brake Caliper Overhaul (Rear).
• Caliper to knuckle clearance.
Brakes Squeak During Application
O
Worn out brake lining.
• Uneven brake lining wear.
• Glazed brake lining.
• Incorrect brake lining material.
• Contaminated brake lining.
• Brake lining damage by abuse.
• Scored rotor. Refer to Refinishing Brake Rotors (Front)
or
Refinishing Brake Rotors (Rear).
• Brake assembly attachments loose (including splash
shield).
• Excessive vehicle loading.