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Home >> GMC >> 1987 >> Forward Control 7.4 W, Standard >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Disc & Drum - Except Astro, Safari & "S" 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
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Fig 2: Procedure for Excessive Brake Pedal Effort - 1 of 2
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Fig 3: Procedure for Excessive Brake Pedal Effort - 2 of 2
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