Envoy 2WD V6-4.3L VIN W (1998)
Brake Master Cylinder: Testing and Inspection
These tests will not find all master cylinder malfunctions. If the cause is not found with these tests, refer to "Brake System Diagnosis". See: Testing and
Inspection
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Check for a cracked casting or brake fluid leaks around the master cylinder. A leak will have at least one drop of fluid. A damp condition is
normal.
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Check the pedal linkage for binding and for incorrect pushrod length.
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Disassemble the master cylinder if there is improper brake pedal travel or brake pedal binding. Refer to Master Cylinder Overhaul.
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Check the master cylinder for swollen or elongated primary piston seals. If you find swollen seals, refer to "Brake Fluid and Brake Fluid
Handling" in Brake Fluid/Service Precautions.
