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GMC Workshop Service and Repair Manuals

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Crankcase Ventilation System - Revised Maintenance|Page 4089 > < Crankcase Ventilation System - Revised Maintenance|Page 4087

K 3500 Truck 4WD V8-393 6.5L DSL Turbo VIN S (1995)

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in the crankcase. As the intake vacuum decreases, the spring pushes the diaphragm away from the top of the outlet tube to prevent the crankcase
pressure from going positive.

Crankcase Ventilation System - Revised Maintenance|Page 4089 > < Crankcase Ventilation System - Revised Maintenance|Page 4087