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Home >> GMC >> 1991 >> Value Van 7.4 N >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Disc Brake System & Drum Brake System - RWD Trucks >> Hydro-Boost Trouble Shooting

Hydro-Boost Trouble Shooting

NOTE: Use the following diagnostic charts to diagnose the Hydro- Boost system.
Fig 1: Procedure for Slow or Incomplete Pedal
G71180Courtesy of GENERAL MOTORS CORP.
Fig 2: Procedure for Excessive Brake Pedal Effort - 1 of 2
G71181Courtesy of GENERAL MOTORS CORP.
Fig 3: Procedure for Excessive Brake Pedal Effort - 2 of 2
G71182Courtesy of GENERAL MOTORS CORP.
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