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Chevy Truck
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2001
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Express 1/2 Ton Van V6-4.3L VIN W
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Description and Operation
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Emission Control Systems
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Exhaust Gas Recirculation (EGR) System
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Purpose
Purpose
The
Exhaust Gas Recirculation
(EGR)
system lowers the Oxides Of Nitrogen
(NOx)
emission levels created by the high combustion temperatures.