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Buick
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2009
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Allure Super
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Repair and Diagnosis
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Engine Performance
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System
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Engine Control System & Fuel System - 5.3L - DTC P0420 To DTC P3449
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DTC P3400
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Circuit/System Testing
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Mechanical System Testing
Mechanical System Testing
Refer to
Cylinder Deactivation (Active Fuel Management) System Diagnosis
.