GMC chervolet camaro 1999 Service Manual page 491

5-16 Hydraulic Brakes
Brakes
Hydraulic Brake Diagnostic System Check (cont'd)
Symptom
Causes
Scraping Noise from Brakes
• Worn out brake lining. Refer to Disc Brakes.
• Uneven brake lining wear. Refer to Disc Brakes.
• Contaminated brake lining. Refer to Disc Brakes.
• Brake lining damage by abuse. Refer to Disc Brakes.
• Brake assembly attachments loose (including splash
shield). Refer to Disc Brakes.
• Loose front suspension parts. Refer to Front
Suspension.
• Rotor corroded. Refer to Hydraulic Brakes.
Brakes Squeak without Application
• Worn out brake lining. Refer to Disc Brakes.
• Uneven brake lining wear. Refer to Disc Brakes.
• Glazed brake lining. Refer to Disc Brakes.
• Incorrect brake lining material. Refer to Disc Brakes.
• Contaminated brake lining. Refer to Disc Brakes.
• Brake lining damage by abuse. Refer to Disc Brake.
• 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. Refer to
Hydraulic Brakes.
• Sticking caliper or caliper pistons. Refer to Brake Caliper
Overhaul (Front) or Brake Caliper Overhaul (Rear).
• Caliper to knuckle clearance. Refer to Disc Brakes.
Brakes Squeak During Application
• Worn out brake lining. Refer to Disc Brakes.
• Uneven brake lining wear. Refer to Disc Brakes.
• Glazed brake lining. Refer to Disc Brakes.
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• Incorrect brake lining material. Refer to Disc Brakes.
• Contaminated brake lining. Refer to Disc Brakes.
• Brake lining damage by abuse. Refer to Disc Brakes.
• Scored rotor. Refer to Refinishing Brake Rotors (Front)
or Refinishing Brake Rotors (Rear).
• Brake assembly attachments loose (including splash
shield). Refer to Disc Brakes.
• Excessive vehicle loading.
Brakes Chatter (Roughness)
• Scored rotor. Refer to Refinishing Brake Rotors (Front)
or Refinishing Brake Rotors (Rear).
• Improper thickness variation in rotor. Refer to Brake
Rotor Thickness Variation Check.
• Excessive lateral runout in rotor. Refer to Brake Rotor
Lateral Runout Check.
• Brake assembly attachments loose (including splash
shfeld). Refer to Disc Brakes.
• Loose front suspension parts. Refer to Front
Suspension.
• Out-of-balance wheel assembly. Refer to Tires and
Wheels in Suspension.
• Improperly torqued wheel nuts. Refer to Tires and
Wheels in Suspension.
• Rotor corroded. Refer to Hydraulic Brakes.
• Grease or dirt on the rotor. Refer to Hydraulic Brakes.
Brakes Groan at the End of Stop
• Incorrect lining material. Refer to Disc Brakes.
• Contaminated brake lining. Refer to Disc Brakes.
• Brake lining damage by abuse. Refer to Disc Brakes.
• Grease or dirt on the rotor. Refer to Hydraulic Brakes.