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GMC
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1993
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C3500 HD 5.7 K, Automatic
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Repair and Diagnosis
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Brakes
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Mechanical - Hydraulic
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Disc & Drum Brake System
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Adjustments
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Height-Sensing Proportioning Valve
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Notes
Height-Sensing Proportioning Valve: Notes
NOTE:
If front wheel lock-up is experienced during braking when vehicle is near maximum GVWR, adjust height-sensing proportioning valve.