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GMC
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1983
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Magnavan 6.2 J, 400/M40
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Repair and Diagnosis
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Engine Performance
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System
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EGR Function Testing
EGR Function Testing
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System Testing
Functional Tests
Vacuum Modulated & Negative Back Pressure Types
Positive Back Pressure Type
EGR-TVS Test (Hot)
EGR-TVS Test (Cold)