Operation CHARM
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GMC Truck
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1984
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C 2500 3/4 Ton Pickup 2WD L6-250 4.1L VIN D 2-bbl
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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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EGR Valve
EGR Valve
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Testing and Inspection
Negative Back Pressure EGR Valve
Ported Vacuum EGR Valve
Positive Back Pressure EGR Valve
Locations
Service and Repair