Operation CHARM
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GMC Truck
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1988
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S15/T15 4WD Jimmy L4-151 2.5L
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Repair and Diagnosis
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Brakes and Traction Control
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Power Brake Assist
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Hydraulic Brake Booster
Hydraulic Brake Booster
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Description and Operation
Hydro-Boost
Hydro-Boost II
Testing and Inspection
Accumulator Leak-Down, System Does Not Hold Charge
Grabby Brakes or Booster Chatters/Pedal Vibrates
Slow Brake Pedal Return
Service and Repair
Bleeding Procedure
Hydro-Boost
Hydro-Boost II
Bendix Brake Boosters
Hydro-Boost Assembly
Hydro-Boost II Assembly