gmc Workshop Repair Guides

GMC Workshop Service and Repair Manuals

Vacuum Pump, Brakes|Description and Operation|Page 8020 > < General Service Information|Page 8016
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Vacuum Pump: Description and Operation

These vehicles use a belt driven vacuum pump to either aid the engine or operate independently to maintain a proper vacuum level for the power
brake system, emission controls or other vacuum powered accessories.

Vacuum Pump, Brakes|Description and Operation|Page 8020 > < General Service Information|Page 8016