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Chevrolet
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2000
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Astro Van 2WD V6-4.3L VIN W
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Repair and Diagnosis
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Powertrain Management
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Emission Control Systems
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Exhaust Gas Recirculation
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Description and Operation
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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.