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Home >> GMC >> 1990 >> Forward Control 6.2 J, Automatic, 400/M40 >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> DISC & DRUM (C, G, K, P, R & V Series) >> 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.