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GMC Truck
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1999
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Savana 1 Ton Van V8-454 7.4L VIN J SFI
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Repair and Diagnosis
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Brakes and Traction Control
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Hydraulic System
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Description and Operation
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Combination Valve Description
Combination Valve Description
The combination valve is located at the
Electronic Brake Control Module
(EBCM).
If it becomes apparent that there is a mechanical problem, refer to Combination Valve Replacement.