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Home >> GMC >> 2002 >> Sierra 1500 HD, 4WD >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Disc Brakes (Cab & Chassis, & Hd) >> Troubleshooting >> General Diagnosis >> Hydraulic Brake System

Hydraulic Brake System

Perform the brake system vehicle road test before using the brake symptom tables in order to duplicate the customer's concern. See BRAKE SYSTEM VEHICLE ROAD TEST  . Review the system description and operation in order to familiarize yourself with the system functions. See DESCRIPTION & OPERATION  .

Inspect for aftermarket devices which could affect the operation of the hydraulic brake system. See CHECKING AFTERMARKET ACCESSORIES  . Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom. Inspect the brake fluid reservoir for the proper brake fluid level. Faulty electrical connections or wiring may be the cause of intermittent conditions.