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Hummer
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2010
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H3 Base, Standard
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Repair and Diagnosis
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Engine Performance
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System
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Engine Controls And Fuel - 3.7L - DTC P1400 To DTC P2635
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DTC P2440
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DTC Descriptor
DTC Descriptor
DTC P2440
Secondary Air Injection (AIR) System Shut-Off Valve Stuck Open