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GMC Workshop Service and Repair Manuals

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Relays and Modules - Brakes and Traction Control > < Vacuum Brake Booster Check Valve|Service and Repair|Page 14973

K 1500 Yukon 4WD V8-5.3L VIN Z Flex Fuel (2003)

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Vacuum Pump: Description and Operation

Supplemental Brake Assist Unit

Supplemental Brake Assist (SBA) unit creates vacuum for the brake booster in case of a vacuum loss or low vacuum to the brake booster.

Relays and Modules - Brakes and Traction Control > < Vacuum Brake Booster Check Valve|Service and Repair|Page 14973