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GMC Truck
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1999
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Savana 1 Ton Van V8-5.7L VIN R
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Repair and Diagnosis
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Powertrain Management
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Fuel Delivery and Air Induction
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Description and Operation
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Fuel System
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Fuel System Description - CSFI
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Modes of Operation
Modes of Operation
The control module monitors the voltages from several sensors in order to determine how much fuel to give the engine. The fuel is delivered under one of several conditions called modes. The control module controls all of the modes.