buick Workshop Repair Guides

Buick Workshop Service and Repair Manuals

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Vacuum Pump, Brakes|Service and Repair > < Excessive Brake Pedal Effort/VAC. Pump Inop. & Warning Light on|Page 3314

Somerset V6-181 3.0L (1986)

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Vacuum Pump: Component Tests and General Diagnostics

    Before attempting to diagnose the vacuum pump system make certain the brake hydraulic system and the brake booster are in proper working order.

Vacuum Pump, Brakes|Service and Repair > < Excessive Brake Pedal Effort/VAC. Pump Inop. & Warning Light on|Page 3314